The concept behind duck typing, also known as late binding, is pretty simple; if an object responds to all the methods a function is expected to call, that object can be passed to the function.

Duck typing背后的概念非常简单，就是所谓的迟绑定；如果对象具有某个函数希望调用的所有方法，就可以将这个对象传递给该函数。

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This strange bird that some may call a duck is actually pretty fascinating.

这种奇怪的鸟，有些人可能把牠叫做野鸭，实际上是非常令人着迷的。

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There's a pretty baby duck.

有一只可爱的小鸭。

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And this week, that territory feels pretty familiar: I hadn't remembered until I saw it again that Duck Soup, made in 1933 at the height of the Great Depression, begins with talk of an economic bailout.

NPR: 'Duck Soup': Take One Fiscal Crisis, Boil Merrily

Captain, then Lieutenant, Lawson went pretty much all around the world, leaving his B-25, The Ruptured Duck, and one of his legs in China.

FORBES: Move up http://i.forbesimg.com t Move down

Well, it seems pretty clear that should these changes occur in any nontrivial fashion, you would have to duck to get out of the way of the ensuing economic boom, regardless of the uncertainty.

WSJ: Clifford S. Asness: Uncertainty Is Not the Problem