They want to get as far away from each other possible, the ideal angle is 120. But what we have here is a four-membered ring, so what angle does 90° that have to be, that bond? 90 degrees.

它们想要尽量远离彼此，最理想的是形成120°键角,但现在是个四元环,所以这键角应该多大？

麻省理工公开课 - 化学原理课程节选

This is the easiest question all day, what is the bond angle between all of these?

这个问题很简单，键角是多少？

麻省理工公开课 - 化学原理课程节选

So what we're predicting is a bond angle of 90 degrees.

垂直的轨道上。

麻省理工公开课 - 化学原理课程节选

It was a calculated risk, however, one I hoped would establish a bond between us without going overboard on the sisterhood angle.

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