Built bridges and roads and automobiles, so we can get from one place to another relatively quickly because of that.
桥梁和道路的修建以及汽车的出现,使我们能够快速地,从一个地方到另一个地方
And I hope you've had a chance to look at the reading material, because I'm going to go through this relatively quickly.
我行为你们都有看过阅读材料,因为这些内容我会很快地过一下。
We'll do this relatively quickly but I hope I won't rush it like I did last time.
我们会相对讲快一点,但我希望这次我不会讲得像上次那样急促
Remember that these cells are relatively large compared to bacteria and so diffusion doesn't occur very quickly over this length scale.
要知道这些细胞相对细菌而言,还是比较大的,扩散作用在这种尺度上,发生得不是那么快
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