When Caitlin's first letters reached Martin, they were simple and general.
马丁收到凯特琳的第一封信时,信写得简单而笼统。
Ultimately, it is the age at which the woman begins bearing children that is the biggest factor, the paper in Biology Letters suggests: Younger women, in general, bear more healthy children.
归根结底,女性开始生孩子的年龄是最大的影响因素,这篇发表于《生物学快报》上的论文建议:一般说来,更年轻的女性生的孩子会更加健康。
An international team of 16 scientists today reports the first direct measurement of the general rate of genetic mutation at individual DNA letters in humans.
近日,一个由16位科学家组成的国际性团队报道了首例人的个体DNA序列总基因突变速率的直接测量数据。
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