那么当我们沿着行向右走的时候，这是我漂亮的元素周期表。

So as we go across the row, and this is my beautiful picture of a periodic table here.

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当我们来到法国阿登地区时，路变得越来越难走，上坡的路变得更长也更陡了。

The terrain became increasingly tough as we approached the Ardennes region in France, the climbs becoming longer and steeper.

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当我们沿着一条拥挤的街道向前走的时候，我们听到后面有急促的脚步声和喊叫声。

And then, walking down a crowded street, we heard behind us the sound of pounding feet and somebody yelling at us.

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Then we see that when this culture comes to an end, it is accompanied by people fleeing, getting away from the Mycenaean world.

随后我们看到当这个文明走到了尽头,随之而来的是民众的背离,人们从迈锡尼逃离

耶鲁公开课 - 古希腊历史简介课程节选

As we go down a column, what happens is that the ionization energy decreases.

当我们沿着列向下走的时候，会发现电离能是在降低的。

麻省理工公开课 - 化学原理课程节选

when we remove the barrier and the gases mix, you know it's over.

当我们移走隔板并且气体混合后，我们知道事情就结束了。

麻省理工公开课 - 热力学与动力学课程节选