But, as with all tools, you have to know when to use it.
但是，像所有工具一样，必须知道如何使用它。
It is hard to imagine that our world as we know it, and all that is familiar to us, would likely not exist if not for the Moon.
很难想象，如果不是月球，我们现在所知的这个世界，以及对我们来说非常熟悉的一切，很可能不存在。
I also need to failure, and its success as valuable to me, only when I know all do a bad way, can I know the right way to make it work what.
失败也是我需要的，它和成功对我一样有价值，只有在我知道一切做不好的方法以后，我才能知道做好一件工作的方法是什么。
As we all know it is very important to keep healthy.
我们都知道持续健康是非常重要的。
As we all know, it is very dangerous to drive while one is drunk.
我们都知道酒后驾驶是非常危险的。
As it is know to all , Beijing is a city with three-thousand-year history .
众所周知，北京是一个拥有三千年历史的城市。
As we all know it can be difficult to forgive.
因为我们都知道，它是难以原谅。
As we all know, it is very expensive to both live and travel within the US.
众所周知，它是非常昂贵的对居住和旅行在美国范围内。
As we all know, it is very expensive to both live and travel within the US.
众所周知，它是非常昂贵的对居住和旅行在美国范围内。
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