They're going to move from a negative pole to a positive pole, so they're going to move through this gel.

它们会从负极移向正极,会通过这块凝胶板

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That is how you get from one side to the other.

你要从这个轨道的一端移向另一端。

麻省理工公开课 - 固态化学导论课程节选

We're going to start at the right and work to the left.

我们先看右边,再移向左边

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