It varies with the square of distance so it goes - in order to go twice as far it takes four times as long.

速度是与距离的平方正相关的--,如果要扩散两倍的距离要多花四倍的时间

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as far as it comes to, you know, where products come from, where products go and that sort of thing. But I mean,

我是说，像此类产品的发明，用途等等，我们从未想过。

关于全球化 - SpeakingMax英语口语达人

One even might go so far as to say that it could be a controlled substance.

其中有一种甚至到目前为止,还是受管制药物

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