I'm going to give an example or example of that--of the train kind of going by you, and the sound heading off in the other direction.
我将会举个例子,比方说,那种火车经过你时,它的声音会从别的方向传来
I'm going to get back to your answer in a second because you're heading in the right direction.
内嵌的循环,这儿,我们做了m次,但是它内部还有一步呢,对不对?
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