Even among identical twins there is a great deal of variation in personal preference, environment, and hence the risk for disease.
甚至是在同卵双生子中，在个人偏好、环境都有很大差异，因而疾病风险也有差异。
A free science library and personal learning tool that currently concentrates on genetics, the study of evolution, variation, and the rich complexity of living organisms.
Scitable—免费的自然科学图书馆和个人学习工具，目前专注于遗传学、进化论、变异学以及生物复杂性等领域。
Gender and age are generally linked with other situational and personal variables, making it difficult to determine specific sources of variation.
性别和年龄与其它的环境和个人变量普遍联系，以致很难测定变动的真正来源。
Gender and age are generally linked with other situational and personal variables, making it difficult to determine specific sources of variation.
性别和年龄与其它的环境和个人变量普遍联系，以致很难测定变动的真正来源。
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