A stimulus bill is both difficult and easy to sell.

一项刺激计划的通过说难也难，说简单也简单。

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This is actually a piece of code that is really easy to think about recursively and is much more difficult to think about in other ways.

这确实是一段用递归思考起来非常容易,而其它方法特别麻烦的代码,这一段代码的意思就是。

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And I do that very precisely because it'll teach you a little bit about how easy or difficult it is to do it and what kind of information you retrieve from a dietary assessment.

我这样要求是因为,这能教给你,做评估的难易程度,以及你们能从饮食评估中得到何种信息

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Software is easy to copy and difficult to patent, but relationships, culture and customer loyalty are difficult to take away.

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These constraints make some evolutionary transitions easy and others more difficult.

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Right here on the flight line in crash landings, the helicopters landing in what are called brown-out conditions, meaning the dust on the desert floor rises up and engulfs the helicopter and it is very difficult for the pilot to see the ground in those conditions and very easy to mess up the landing.

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