知识扩展
词语辨析
alternate,periodic
【解说】
这两个词的共同意思是有规律地重复再现。alternate指两件事物交替出现或一件事物每隔一段时间出现;periodic指可预测的周期性发生。alternate,rotate
【解说】
这组词都指“轮流”“交替”,它们的区别是alternate指两者间“轮流”,rotate则指三者或三者以上。例如The manager said he will alternate Jane and Joe as editor.经理说他会让简和乔轮流做编辑。He told me that he will rotate Caddy,Keat and Ilott as his teacher.他告诉我他会让卡迪,基特和伊洛特轮流当他的老师。alternate between,alternate with
【解说】这两个短语的区别在于1.alternate between的意思是“相互交替”,alternate with的意思是“与之交替”。2.alternate between一般接and连接的并列宾语,而alternate with则接名词或代词作宾语。