This completely could change if you were to flip from one to the other conformation which can happen in chemical reactions.

在化学反应中,它们的形状,可以从一种折叠成另外一种。

麻省理工公开课 - 化学原理课程节选

So it's very important that the double bond locks it in a particular conformation.

所以双键把它们锁定在某一特定形状,是十分重要的。

麻省理工公开课 - 化学原理课程节选