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1·Their cohort included a national sample of 4,674 Australians from the Australian twin Registry cohort II. Subjects included both identical and fraternal twins; 57 percent were women.

他们的研究群体包括一个来自于澳大利亚双胞胎注册组群中4674人的样本，包括同卵双生和异卵双生的双胞胎，其中57%是女人，平均年龄38岁。

2·Their cohort included a national sample of 4, 674 Australians from the Australian Twin Registry Cohort II. Subjects included both identical and fraternal twins; 57 percent were women.

他们的研究群体包括一个来自于澳大利亚双胞胎注册组群中4674人的样本，包括同卵双生和异卵双生的双胞胎，其中57%是女人，平均年龄38岁。

3·Researchers measure a trait, such as sensation-seeking, in identical and fraternal twin pairs growing up in the same environment, and consider whether the two twin types are equally similar.

研究者检测一种特性，例如感觉的寻求，在相同的环境下，相同的双胞胎兄弟成长，考虑是否两个双胞胎类型是完全相似。

4·I didn't know you were a twin! Are you identical or fraternal?

我不知道你居然是双胞胎！你们是同卵双生还是异卵双生？