So, it's awkward to have to wait for a cow to get infected before you can vaccinate a population.

在给人们预防接种之前,你只有干等着,直到有一头奶牛感染了病毒才行

耶鲁公开课 - 生物医学工程探索课程节选

There are a lot of volunteer kind of programs that you can do for a couple of years until you can find a job.

有许多志愿者项目，你可以参与几年，直到你找到工作。

就业很难 - SpeakingMax英语口语达人

And so you feel helpless until you notice that there is, off to the right, a side track and at the end of that track, there is one worker working on the track.

你极为无助,直到你发现，在轨道的右侧，有一条侧轨,而在侧轨的尽头，只有一名工人在那施工。

耶鲁公开课 - 公正课程节选

You can't have a notion of "raw" until you have the notion of "cooked."

你不可能有“生食“这个概念“,直到你“熟食“这个概念的出现“

耶鲁公开课 - 文学理论导论课程节选