You might think a bird that could fly so fast would be safe from most types of danger.

你可能会认为，一只能飞得如此之快的鸟儿会在大多数危险前安全无恙。

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So what if you want to fly? University of Washington scientists say it depends on how fast you can replace your flight feathers when you molt.

那么，你如果想飞，你的体重该保持在什么水平上呢？ 华盛顿大学的科学家们说，这取决于你在换羽期间更换飞羽的速度。

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There are so many creatures up there, they are so busy, so athletic, so tiny, that we had to fly up and give you a peek.

那么多的生物在那里，他们是如此地忙碌，如此地矫健，如此地微小的，让我们也飞起来，偷看它们一眼吧。

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Why,if there was two birds setting on a fence, he would want you to decide which one would fly first so he could win money.

VOA: special.2009.08.29

One sleep researcher joked that these two are connected because what happens is dreams fly around through the ether and then their erections serve as antennas so you pick them up.

有研究人员开过玩笑说，这两者是有联系的,因为梦境从上空飞过,他们的勃起就像天线一样,把梦境接收进你大脑。

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It's very difficult to avoid them so you could fly into them and there's an obvious hazard for helicopters in the area.

BBC: red kite

So when you fly -- back then, at least -- now there are probably more direct flights, but back then oftentimes you had to fly through Australia.

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So let fly -- you can't really afford a therapist anyway.

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