Many children use Internet to get useful information and to relax in their free time.

许多孩子利用互联网获取有用的信息，并在空闲时间放松自己。

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But it is more difficult to get useful information.

但是也增加了从中获取有用信息的难度。

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You'll get useful information and leads by networking with those who are active in your field of expertise.

你将会得到有用的信息，并能结交到在你的行业领域出名的专业人士。

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But notice what this does. The first thing it does is, it says, let's check and make sure x is greater than or equal to 0. If it isn't, notice what's going to happen. None of that block is going to get executed, and it's going to come down here and print out a useful piece of information, which says, hey, you gave me a negative number. I don't know how to do this.

做的是和以前一样的事情,但是注释它做了什么，第一件做的事情就是,程序说，要去检查并且确信x是大于等于0的，如果不是的话，请注意会发生什么,下面的代码都不会被执行,程序会到这里来然后显示一些有用的信息,信息会说，嘿，你给了我一个负数,我不知道该怎么弄这个了。

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We get useful information from the face when listening to someone, but human faces are very stimulating and all this takes processing.

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What they did not get was much useful information about how either Romney or Obama would govern.

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America has also made overtures to erstwhile enemies in its desperation to get hold of any useful information.

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