然而，火星陨石坑被填满的速度比月球陨石坑快很多。

However, Martian craters get filled in considerably faster than their lunar counterparts.

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与月球上相同，那些巨大陨石坑的范围（例如，那些巨大到自形成后尚未被尘埃填满的陨石坑）标志着火星表面的年龄。

As on the Moon, the extent of large impact cratering (i.e. craters too big to have been filled in by erosion since they were formed) serves as an age indicator for the Martian surface.

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在许多国家，数以百万计的灌溉井现在从地下水源抽水的速度，超过了降雨所能再次填满的速度。

Millions of irrigation wells in many countries are now pumping water out of underground sources faster than rainfall can refill them.

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So, in order to fill our octet, what we do is put two on the nitrogen and two on the carbon.

因此，为了填满我们的“八隅体“,我们需要将两个放到氮上，将另外两个放到碳上。

麻省理工公开课 - 化学原理课程节选

So in terms of total numbers that we would need to complete our octets and fill our valence shells, we would need 18 electrons.

因此要填满我们的“八隅体“,排满所有的价壳层，我们总共需要十八个电子。

麻省理工公开课 - 化学原理课程节选

And which ones you can put in. How to fill up that bin. Very important in shipping.

还有置放的种类，如何填满这个箱子呢？,这在运输中是个很重要的问题。

麻省理工公开课 - 计算机科学及编程导论课程节选