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单词拼写：
certain
音标发音：
[ˈsɜːt(ə)n][ˈsɜːrt(ə)n]
词性词义：
adj.某一；必然的；确信；无疑的；有把握的
速记技巧：
词源词根法
拆：
"certain"这个词的词根是"cert"，来源于拉丁语中的"certus"，意思是"确定的"或"确实的"。这个词根也可以在许多其他英语单词中找到，例如"certify"、"certificate"、"certitude"等。
记：
通过了解"certain"这个词的词根，我们可以更好地理解它的含义。例如，当我们说某人"is certain about something"时，意思是这个人对某件事情非常有把握，非常确定。
英英释义：
Adjective:
1.definite but not specified or identified; "set aside a certain sum each week" "to a certain degree" "certain breeds do not make good pets" "certain members have not paid their dues" "a certain popular teacher" "a certain Mrs. Jones"2.having or feeling no doubt or uncertainty; confident and assured; "felt certain of success" "was sure (or certain) she had seen it" "was very sure in his beliefs" "sure of her friends"3.established beyond doubt or question; definitely known; "what is certain is that every effect must have a cause" "it is certain that they were on the bus" "his fate is certain" "the date for the invasion is certain"4.certain to occur; destined or inevitable; "he was certain to fail" "his fate is certain" "In this life nothing is certain but death and taxes" "he faced certain death" "sudden but sure regret" "he is sure to win"5.established irrevocably; "his fate is sealed"6.reliable in operation or effect; "a quick and certain remedy" "a sure way to distinguish the two" "wood dust is a sure sign of termites"7.exercising or taking care great enough to bring assurance; "be certain to disconnect the iron when you are through" "be sure to lock the doors"
短语词组：
certain circumstance某种情况
certain extent一定程度上
certain reason某种理由
certain year某年
absolutely certain绝对肯定
almost certain几乎可以肯定的
nearly certain几乎可以肯定的
pretty certain肯定的
quite certain相当有把握的
totally certain完全确信
make certain弄清楚〔明白,确实〕,落实
make certain of the date of the meeting把开会的日期弄清楚
certain to come一定来
certain to happen一定要发生的
certain to start一定发生
certain about确信,深信,相信
certain of确信,深信,相信
certain of success肯定会成功
记忆技巧：
cert 确实,确信 + -ain 表示人
同义词辨析：
certain confident convinced positive sure【导航词义：确信的】
certainadj.肯定的，确信的
〔辨析〕
指确定无疑的，表示说话人有确切的理由或不容置疑的证据，语气较强，通常作表语，多用于肯定句或正式的书面语中，常可与positive 换用，但不可单独用作回答。
〔例证〕
He is absolutely certain/positive that he has met her before.
他绝对肯定他以前见过她。
She's not certain/positive when the movie will begin.
她不确定电影何时开始。
It is certain/positive that every effect must have a cause.
毋庸置疑，有果必有因。
He is certain/positive that the fruit is ripe.
他确信水果熟了。
confidentadj.确信的，有把握的
〔辨析〕
指确信某事会以自己想要或期望的方式发生的，通常作表语。
〔例证〕
They are confident next year's profits will be higher.
他们确信明年的利润会增加。
The French football team is confident of victory.
法国足球队对取胜很有把握。
The committee is confident of success.
委员会对成功很有把握。
convincedadj.确信的，信服的
〔辨析〕
指对某事深信不疑的，通常作表语，常后接介词 of 或 that 从句。
〔例证〕
I am convinced that we are doing the right thing.
我确信我们做的事情是正确的。
I am fully convinced we can do it.
我完全确信我们能做这件事。
He is firmly convinced of the possibility of life on other planets.
他坚信在其他行星上可能存在生命。
positiveadj.确信的，肯定的
〔辨析〕
指对某事物的正确性或真实性绝对肯定的，通常作表语，可单独用作肯定回答，常后接介词 about/of 或 that 从句。
〔例证〕
She is absolutely positive that she opened the window.
她绝对肯定她开窗户了。
He can't be positive where he lost his key.
他说不准是在哪里丢的钥匙。
-Are you sure about that?
—-那事你能肯定吗？
-Positive.
—-能。
We'll benefit from this deal -I'm positive of that.
我们会从这笔交易中赚到钱的，对此我有把握。
sureadj.确信的，确定的
〔辨析〕
指主观上对某事物的正确性或真实性没有疑虑的，常可与 certain 换用，但语气稍弱，通常作表语。
〔例证〕
I am sure/certain that he is honest.
我肯定他是诚实的。
Are you sure/certain that this is the right road?
你肯定这条路对吗?
He wasn't sure/certain whether he would be able to get back as planned.
他不能肯定他是否能如期回来。
双语例句：
1.The only way of avoiding this problem would be if, for some reason, the stars did not shine before a certain time.
唯一避免这种问题的办法是，因为某些原因，星体在一端时间以前是不发光的。
2.A PHP function that can output how much a user would need to donate to get a certain amount of GD.
一个PHP函数，可以输出多少用户需要获得捐赠一定数额的GD。
3.Well, not until a certain git by the name of Lockhart took over as Defence against the Dark Arts teacher, at any rate.
呵呵，直到有天有个叫洛哈特的饭桶当了黑魔法防御术老师，情况就不同啦。
4.As the modern logistics develops to a certain stage, Logistics Park is beginning to be produced.
物流园区是现代物流发展到一定阶段的产物。
5.This overseas experience can be extended by up to a year, allowing students to complete an MBA at certain academic partners.
海外经历可以延长至一年，允许学生在学术伙伴处完成工商管理硕士学位。
6.Nutritional deficiencies do seem to be the cause of certain cases of low testosterone.
营养不良看来确实是导致某些病例睾丸激素偏低的原因。
7.And then, like every leader, they've got to have a certain sort of pizzaz that gets people excited.
就像所有领导人，他们必须有能振奋人心的特质。
8.So, if you have recombination at a certain frequency, I can say exactly how much that helps or hurts the fitness of the population.
因此，如果你获得一定水平的重组率，我可以准确得出它在多大程度上促进或损害人口的适应性。
9.After a certain number of points, the players changed round so that neither could benefit unduly from the wind or the position of the sun.
达到一定比分后，运动员就互换场地，这样双方都不致由于风向和阳光的位置而独得优势。
10.Interestingly enough I also discovered what appeared to be uncensored internet available at a certain library in Tehran.
有趣的是，我发现德黑兰某些图书馆的计算机网络，并没有受到过滤审查的机制的影响。
全部四级六级高考考研例句：
Donohue, now a history teacher, agrees that it helped during certain parts of her education: I can definitely remember what I learned on certain days at school.
出自-2017年6月阅读原文
Consumers are loyal to certain brands.
出自-2017年6月阅读原文
The study, which followed more than 2,000 healthy adults between the ages of 18 and 60, found that certain mental functions—including measures of abstract reasoning, mental speed and puzzle-solving—started to dull as early as age 27.
出自-2016年6月阅读原文
In general, Salthouse and his colleagues found, certain aspects of cognition ( ' , 认知能力) generally started to decline in the late 20s to 30s.
出自-2016年6月阅读原文
Declining mental function is often seen as a problem of old age, but certain aspects of brain function actually begin their decline in young adulthood, a new study suggests.
出自-2016年6月阅读原文
The helpless ones believe intelligence is a fixed characteristic: you have only a certain amount, and that's that.
出自-2016年12月阅读原文
It's commonly known that certain diseases are linked with occupations like lung disease in coal miners.
出自-2016年12月阅读原文
It might mean monitoring employee productivity on a digital leaderboard and offering prizes to the winners, or giving employees digital badges or stars for completing certain activities.
出自-2016年12月阅读原文
Early kites were built for certain uses.
出自-2015年12月听力原文
Any research that suggests that abilities to perform certain behaviors are based in biology is controversial.
出自-2010年12月阅读原文
Only certain parts of the eye can be replaced.
出自-2011年6月听力原文
A drop in oxygen pressure can cause headaches in certain individuals.
2019年12月四级真题（第三套）阅读 section A
Also, certain types of bacteria are extremely harmful, and it takes only a small number to make you sick.
2018年12月四级真题（第三套）阅读 Section B
Back in June, the Federal Communications Commission fined AT&T $100 million over accusations that the carrier secretly reduced wireless speeds after customers consumed a certain amount of data.
2017年6月四级真题（第二套）阅读 Section A
California has been facing a drought for many years now, with certain areas even having to pump freshwater hundreds of miles to their distribution system.
2018年12月四级真题（第一套）阅读 Section C
Donohue, now a history teacher, agrees that it helped during certain parts of her education: "I can definitely remember what I learned on certain days at school."
2017年6月四级真题（第一套）阅读 Section B
In the second experiment meant to pit the mice's hunger against their fear, hungry mice were placed in a cage that had certain "fox-scented" areas and other places that smelled safer but also had food.
2018年6月四级真题（第二套）听力 Section C
It has been found that not eating breakfast is related to the incidence of certain diseases in some countries.
2019年12月四级真题（第三套）阅读 Section B
Or like speeding, it's very easy to put speed cameras in certain places.
2016年6月四级真题（第二套）听力 Section B
Public health groups applauded the approved tax as a step toward fixing certain lasting health issues that plague Americans.
2019年12月四级真题（第一套）阅读 Section C
Student teachers are motivated to help Betty master certain materials.
2018年6月四级真题（第三套）阅读 Section C
The medical community also takes aging for granted, and can do nothing about it except keep people within a certain health range.
2017年12月四级真题（第二套）阅读 Section C
These games will get you used to thinking in a certain way.
2019年12月四级真题（第二套）听力 Section C
This is only at certain times and on condition that they are processed at factories based near Japanese ports.
2018年12月四级真题（第一套）听力 Section A
本文参考文献：
1 http://www.mcb5.cn/study
2 http://www.mcb5.cn/man
3 http://www.mcb5.cn/author
4 http://www.mcb5.cn/call
5 http://www.mcb5.cn/home
6 http://www.mcb5.cn/paragraph
7 http://www.mcb5.cn/back
8 http://www.mcb5.cn/start
9 http://www.mcb5.cn/old
10 http://www.mcb5.cn/find
11 http://www.mcb5.cn/difference
12 http://www.mcb5.cn/before
13 http://www.mcb5.cn/woman
14 http://www.mcb5.cn/real
15 http://www.mcb5.cn/place
16 http://www.mcb5.cn/down
17 http://www.mcb5.cn/last
18 http://www.mcb5.cn/keep
19 http://www.mcb5.cn/great
20 http://www.mcb5.cn/something
核心重点高频常考单词-certain的发音/词性词义/用法/同近反义词/记忆法/词根词缀/高级替换词/中英文例句-秒词邦免费背单词赚钱微信小程序
单词拼写：
certain
音标发音：
[ˈsɜːt(ə)n][ˈsɜːrt(ə)n]
词性词义：
adj.某一；必然的；确信；无疑的；有把握的
速记技巧：
词源词根法
拆：
"certain"这个词的词根是"cert"，来源于拉丁语中的"certus"，意思是"确定的"或"确实的"。这个词根也可以在许多其他英语单词中找到，例如"certify"、"certificate"、"certitude"等。
记：
通过了解"certain"这个词的词根，我们可以更好地理解它的含义。例如，当我们说某人"is certain about something"时，意思是这个人对某件事情非常有把握，非常确定。
英英释义：
Adjective:
1.definite but not specified or identified; "set aside a certain sum each week" "to a certain degree" "certain breeds do not make good pets" "certain members have not paid their dues" "a certain popular teacher" "a certain Mrs. Jones"2.having or feeling no doubt or uncertainty; confident and assured; "felt certain of success" "was sure (or certain) she had seen it" "was very sure in his beliefs" "sure of her friends"3.established beyond doubt or question; definitely known; "what is certain is that every effect must have a cause" "it is certain that they were on the bus" "his fate is certain" "the date for the invasion is certain"4.certain to occur; destined or inevitable; "he was certain to fail" "his fate is certain" "In this life nothing is certain but death and taxes" "he faced certain death" "sudden but sure regret" "he is sure to win"5.established irrevocably; "his fate is sealed"6.reliable in operation or effect; "a quick and certain remedy" "a sure way to distinguish the two" "wood dust is a sure sign of termites"7.exercising or taking care great enough to bring assurance; "be certain to disconnect the iron when you are through" "be sure to lock the doors"
短语词组：
certain circumstance某种情况
certain extent一定程度上
certain reason某种理由
certain year某年
absolutely certain绝对肯定
almost certain几乎可以肯定的
nearly certain几乎可以肯定的
pretty certain肯定的
quite certain相当有把握的
totally certain完全确信
make certain弄清楚〔明白,确实〕,落实
make certain of the date of the meeting把开会的日期弄清楚
certain to come一定来
certain to happen一定要发生的
certain to start一定发生
certain about确信,深信,相信
certain of确信,深信,相信
certain of success肯定会成功
记忆技巧：
cert 确实,确信 + -ain 表示人
同义词辨析：
certain confident convinced positive sure【导航词义：确信的】
certainadj.肯定的，确信的
〔辨析〕
指确定无疑的，表示说话人有确切的理由或不容置疑的证据，语气较强，通常作表语，多用于肯定句或正式的书面语中，常可与positive 换用，但不可单独用作回答。
〔例证〕
He is absolutely certain/positive that he has met her before.
他绝对肯定他以前见过她。
She's not certain/positive when the movie will begin.
她不确定电影何时开始。
It is certain/positive that every effect must have a cause.
毋庸置疑，有果必有因。
He is certain/positive that the fruit is ripe.
他确信水果熟了。
confidentadj.确信的，有把握的
〔辨析〕
指确信某事会以自己想要或期望的方式发生的，通常作表语。
〔例证〕
They are confident next year's profits will be higher.
他们确信明年的利润会增加。
The French football team is confident of victory.
法国足球队对取胜很有把握。
The committee is confident of success.
委员会对成功很有把握。
convincedadj.确信的，信服的
〔辨析〕
指对某事深信不疑的，通常作表语，常后接介词 of 或 that 从句。
〔例证〕
I am convinced that we are doing the right thing.
我确信我们做的事情是正确的。
I am fully convinced we can do it.
我完全确信我们能做这件事。
He is firmly convinced of the possibility of life on other planets.
他坚信在其他行星上可能存在生命。
positiveadj.确信的，肯定的
〔辨析〕
指对某事物的正确性或真实性绝对肯定的，通常作表语，可单独用作肯定回答，常后接介词 about/of 或 that 从句。
〔例证〕
She is absolutely positive that she opened the window.
她绝对肯定她开窗户了。
He can't be positive where he lost his key.
他说不准是在哪里丢的钥匙。
-Are you sure about that?
—-那事你能肯定吗？
-Positive.
—-能。
We'll benefit from this deal -I'm positive of that.
我们会从这笔交易中赚到钱的，对此我有把握。
sureadj.确信的，确定的
〔辨析〕
指主观上对某事物的正确性或真实性没有疑虑的，常可与 certain 换用，但语气稍弱，通常作表语。
〔例证〕
I am sure/certain that he is honest.
我肯定他是诚实的。
Are you sure/certain that this is the right road?
你肯定这条路对吗?
He wasn't sure/certain whether he would be able to get back as planned.
他不能肯定他是否能如期回来。
双语例句：
1.The only way of avoiding this problem would be if, for some reason, the stars did not shine before a certain time.
唯一避免这种问题的办法是，因为某些原因，星体在一端时间以前是不发光的。
2.A PHP function that can output how much a user would need to donate to get a certain amount of GD.
一个PHP函数，可以输出多少用户需要获得捐赠一定数额的GD。
3.Well, not until a certain git by the name of Lockhart took over as Defence against the Dark Arts teacher, at any rate.
呵呵，直到有天有个叫洛哈特的饭桶当了黑魔法防御术老师，情况就不同啦。
4.As the modern logistics develops to a certain stage, Logistics Park is beginning to be produced.
物流园区是现代物流发展到一定阶段的产物。
5.This overseas experience can be extended by up to a year, allowing students to complete an MBA at certain academic partners.
海外经历可以延长至一年，允许学生在学术伙伴处完成工商管理硕士学位。
6.Nutritional deficiencies do seem to be the cause of certain cases of low testosterone.
营养不良看来确实是导致某些病例睾丸激素偏低的原因。
7.And then, like every leader, they've got to have a certain sort of pizzaz that gets people excited.
就像所有领导人，他们必须有能振奋人心的特质。
8.So, if you have recombination at a certain frequency, I can say exactly how much that helps or hurts the fitness of the population.
因此，如果你获得一定水平的重组率，我可以准确得出它在多大程度上促进或损害人口的适应性。
9.After a certain number of points, the players changed round so that neither could benefit unduly from the wind or the position of the sun.
达到一定比分后，运动员就互换场地，这样双方都不致由于风向和阳光的位置而独得优势。
10.Interestingly enough I also discovered what appeared to be uncensored internet available at a certain library in Tehran.
有趣的是，我发现德黑兰某些图书馆的计算机网络，并没有受到过滤审查的机制的影响。
全部四级六级高考考研例句：
Donohue, now a history teacher, agrees that it helped during certain parts of her education: I can definitely remember what I learned on certain days at school.
出自-2017年6月阅读原文
Consumers are loyal to certain brands.
出自-2017年6月阅读原文
The study, which followed more than 2,000 healthy adults between the ages of 18 and 60, found that certain mental functions—including measures of abstract reasoning, mental speed and puzzle-solving—started to dull as early as age 27.
出自-2016年6月阅读原文
In general, Salthouse and his colleagues found, certain aspects of cognition ( ' , 认知能力) generally started to decline in the late 20s to 30s.
出自-2016年6月阅读原文
Declining mental function is often seen as a problem of old age, but certain aspects of brain function actually begin their decline in young adulthood, a new study suggests.
出自-2016年6月阅读原文
The helpless ones believe intelligence is a fixed characteristic: you have only a certain amount, and that's that.
出自-2016年12月阅读原文
It's commonly known that certain diseases are linked with occupations like lung disease in coal miners.
出自-2016年12月阅读原文
It might mean monitoring employee productivity on a digital leaderboard and offering prizes to the winners, or giving employees digital badges or stars for completing certain activities.
出自-2016年12月阅读原文
Early kites were built for certain uses.
出自-2015年12月听力原文
Any research that suggests that abilities to perform certain behaviors are based in biology is controversial.
出自-2010年12月阅读原文
Only certain parts of the eye can be replaced.
出自-2011年6月听力原文
A drop in oxygen pressure can cause headaches in certain individuals.
2019年12月四级真题（第三套）阅读 section A
Also, certain types of bacteria are extremely harmful, and it takes only a small number to make you sick.
2018年12月四级真题（第三套）阅读 Section B
Back in June, the Federal Communications Commission fined AT&T $100 million over accusations that the carrier secretly reduced wireless speeds after customers consumed a certain amount of data.
2017年6月四级真题（第二套）阅读 Section A
California has been facing a drought for many years now, with certain areas even having to pump freshwater hundreds of miles to their distribution system.
2018年12月四级真题（第一套）阅读 Section C
Donohue, now a history teacher, agrees that it helped during certain parts of her education: "I can definitely remember what I learned on certain days at school."
2017年6月四级真题（第一套）阅读 Section B
In the second experiment meant to pit the mice's hunger against their fear, hungry mice were placed in a cage that had certain "fox-scented" areas and other places that smelled safer but also had food.
2018年6月四级真题（第二套）听力 Section C
It has been found that not eating breakfast is related to the incidence of certain diseases in some countries.
2019年12月四级真题（第三套）阅读 Section B
Or like speeding, it's very easy to put speed cameras in certain places.
2016年6月四级真题（第二套）听力 Section B
Public health groups applauded the approved tax as a step toward fixing certain lasting health issues that plague Americans.
2019年12月四级真题（第一套）阅读 Section C
Student teachers are motivated to help Betty master certain materials.
2018年6月四级真题（第三套）阅读 Section C
The medical community also takes aging for granted, and can do nothing about it except keep people within a certain health range.
2017年12月四级真题（第二套）阅读 Section C
These games will get you used to thinking in a certain way.
2019年12月四级真题（第二套）听力 Section C
This is only at certain times and on condition that they are processed at factories based near Japanese ports.
2018年12月四级真题（第一套）听力 Section A
本文参考文献：
1 http://www.mcb5.cn/study
2 http://www.mcb5.cn/man
3 http://www.mcb5.cn/author
4 http://www.mcb5.cn/call
5 http://www.mcb5.cn/home
6 http://www.mcb5.cn/paragraph
7 http://www.mcb5.cn/back
8 http://www.mcb5.cn/start
9 http://www.mcb5.cn/old
10 http://www.mcb5.cn/find
11 http://www.mcb5.cn/difference
12 http://www.mcb5.cn/before
13 http://www.mcb5.cn/woman
14 http://www.mcb5.cn/real
15 http://www.mcb5.cn/place
16 http://www.mcb5.cn/down
17 http://www.mcb5.cn/last
18 http://www.mcb5.cn/keep
19 http://www.mcb5.cn/great
20 http://www.mcb5.cn/something
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