"I'm just doing what I know and I'm doing what you taught me." "I never taught you to be a thief."

VOA: standard.2010.07.16

just 'cause you will never know what you're going to get.

就因为你永远也不知道在那里会有什么。

圣莫妮卡和洛杉矶 - SpeakingMax英语口语达人

You never know when one of these could just do the trick.

你永远不会知道,里面的哪个正好是这样子的。

麻省理工公开课 - 固态化学导论课程节选