曼哈顿中说that从句作主语，通常用it作形式主语。 B能不能这么理解，他可以改成It highlights an interesting and often overlooked feature of fraternal-twin pairs that some fraternal twins resemble each other greatly while others look quite dissimilar, namely that they vary considerably on a spectrum of genetic relatedness.
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发表于 2009-7-18 21:00:00
