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1·And this one here, because it is at a higher energy is called antibonding molecular orbital.

这里的这个，因为处在一个较高的能级，被叫做反键分子轨道能级。

2·This is sigma star with the antibonding orbital that came from 1s, and it is a molecular orbital.

这是sigma星，来自于1s的反键轨道，它是一个分子轨道。

3·And I am going to superscript it molecular orbital, and this upper one, to indicate that it's antibonding, has the asterisk.

我将给分子轨道加上标，这个上标，表示反键轨道，有一个星号。