This is in direct contrast to when we're thinking about pi bonds.

这和π轨道,是截然相反的。

麻省理工公开课 - 化学原理课程节选

they're not making direct eye-contact, they're looking at their watch.

他们避免跟你的眼神交流，不时地看看表。

Is there 课堂 - SpeakingMax英语口语达人

They're very simple, very direct but still very polite.

它们简单，直接又不失礼貌。

Can 课堂 - SpeakingMax英语口语达人