天文学家怀疑成对的行星也参与了这种弹弓活动，使它们处于不规则的椭圆轨道上。

Astronomers suspect that pairs of planets also engage in this slingshot activity, leaving them in disturbed, elliptical orbits.

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然后它说，接下来将剩下的电子成对排布，使每个原子都有8个电子。

And then it says, OK, distribute the remaining electrons in pairs so that each atom has eight.

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一个图像的明暗区域形成对比，这种对比使图像具有体积感。

Light and dark areas within an image provide contrast that can suggest volume.

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And then it says, OK, distribute the remaining electrons in pairs so that each atom has eight.

然后它说，接下来将剩下的电子成对排布,使每个原子都有8个电子。

麻省理工公开课 - 固态化学导论课程节选