1. The identification of even one gene does, however, have immense implications for the genetics/environment debate.
    不过，哪怕辩出一个基因对于遗传与环境之争也是意义重大的。

2. His only means of identification was his passport.
    他唯一证明他身份的办法是用他的护照.

3. In a lunchroom a second assistant hurried to the side of the cashier, where they took my $2 check without asking for ID;
    在一家快餐店，一个帮工赶紧走到收银员的身边；在那里他们收下了我 2 美元的支票，连身份证也没看。

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