最后，我想以斯蒂芬·杰·古尔德，举过的一个例子来作为结束。
Finally, I want to end with an example from Stephen Jay Gould.
现在我想跟大家一起做一个例子，来明白到底是怎么回事。
So I now want to work through an example where we can see this happening.
我们来看一个例子，然后你自己想。
Okay lets look at the example and then you can come up with your own.
首先，我想举一个例子。
我也想以此作为一个例子，回答多个问题。
I also want to use this as an example of answering multiple questions.
还有一个例子，一个39岁的家伙，想竞聘另一个讲师职位。
The latest example is a 39 year old candidate for another Assistant Professorship;
还有一个例子，一个39岁的家伙，想竞聘另一个讲师职位。
The latest example is a 39 year old candidate for another Assistant Professorship;
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