1、 Cattle -raising people in East Africa and northern Europe have gained a mutation (突变) that helps them digest milk as adults.
东非和北欧的养牛人获得了一种突变(突变),帮助他们成年后消化牛奶。
来源:2020年普通高等学校招生全国统一考试
2、 Scientists have found a genetic mutation that appears to be the cause of Huntingtonˈs disease.
科学家们已经发现一个似乎是亨廷顿病病因的遗传突变。
来源:秒词邦精选例句