Traditionally, they used to teach people relaxation exercises but that proves too difficult.

这些方法通常被用来帮助人们做放松练习,但效果不佳。

耶鲁公开课 - 心理学导论课程节选

So "I was" will be used to talk about anything that you're referring to that's behind you.

所以，“I was” 会被用来谈论那些你曾经做过的事情。

I was 课堂 - SpeakingMax英语口语达人

It's designed to do a specific thing.

它被设计成用来做特定的事儿。

麻省理工公开课 - 计算机科学及编程导论课程节选

So tens or hundreds of millions of dollars would go into a study like this by the time it was completed, money that could have been used for other things, to test whether eating a low fat diet would reduce risk for breast cancer.

数以百万计的美元,投入到这样的研究,当研究结束时,本可以用来做其他事情的钱,被用来检测是否低脂膳食,可降低患乳腺癌风险

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选