That's a tricky one, shared electrons. All right.

这个有点难度，是共用的电子，好。

麻省理工公开课 - 化学原理课程节选

There's nothing tricky about this one.

这一句型的使用不是很复杂。

I didn't 课堂 - SpeakingMax英语口语达人

So, this one can be tricky because oxygen looks like it's in the middle because of the way it's written, but we need to start by looking at the lowest ionization energy.

这个例子可能有些狡猾,因为氧看起来是在中间的,因为它是这样写的，但是我们需要从寻找最低的电离能开始。

麻省理工公开课 - 化学原理课程节选