有些考题要求考生就一个问题的过去和现在分别进行论述并进行比较，这类题目就是时间对比类考题。

Well, this is also the kind of problem I am going to deal with probably for a couple of years to come.

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始祖鸟的翅膀(顶部)与典型鹮类(中部)和已灭绝不飞行的鹮类(底部)样本对比。

The wing of Xenicibis (top) compared with that of a typical ibis Eudocimus (middle) and the extinct, flightless ibis Apteribis (bottom).

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对比抽象基类和接口的使用。

Contrast the use of an abstract base class against an interface?

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Edgar Lee Masters They are Dreiser, Edgar Lee Masters Lewis H.L. Mencken, Anderson, and Lewis: all American writers. Compare that with the catalog that he gives of his reading on 249, and you'll see what's being elided.

有德莱塞,门肯，Anderson和：,对比一下,他在249页讲的那类作家，你们会发现他隐去了一些内容。

耶鲁公开课 - 1945年后的美国小说课程节选