If you must move, don't follow a stream unless you know it, and in that case, you are not lost.
如果你非要走动的话,别顺着溪流走,除非你对它很熟悉。但是如果你很熟悉,那你就不会迷路了。
An application iterating over such a modified stream would not need to know that it was manipulated.
迭代修改过的流的应用程序不需要知道它处理的是什么。
You did not see a tiny, tiny little stream coming out of each of these orifices.
你看不到细小细小的光束,从这些小孔里出来。
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