To be honest, especially those of you less comfortable here, if you've ever struggled with some program or struggled with some piece of software, oh it's alright, it's not your fault.

说实话，尤其是对那些在这里上课有些吃力的同学，如果你曾经使用哪个程序或软件有困难,好吧，那不是你的错。

哈佛公开课 - 计算机科学课程节选

that was, that still are, that still apply,

那些曾经是，现在依然是，并会将其一直适用下去的，

想要消除不平等 - SpeakingMax英语口语达人

Gee, have you ever wondered how they know the composition of stars that are light-years away?

嘿！你曾经是否想过,他们是怎么知道那些离我们好几光年远的,星星的位置的？

麻省理工公开课 - 固态化学导论课程节选

So, totally avoids the manufacturing processes that are used to produce other vaccines; you got to manufacture DNA instead.

这完全避免了曾经用于,制造其它疫苗的那些生产过程,你只需要制造DNA就行了

耶鲁公开课 - 生物医学工程探索课程节选

Now the surest sign of a hurdle is one of those pointed literary allusions that Milton makes in Lycidas, one of those remote allusions that Johnson had complained about.

如今关于这道坎的最确定无疑的迹象就是,他在里作出的那些文学臆想,即约翰逊曾经抱怨过的那些不切实际的幻想。

耶鲁公开课 - 弥尔顿课程节选

Many values that I had a hard time accepting I came to terms with.

那些我曾经很难接受的价值观,我渐渐地学会接受它们。

普林斯顿公开课 - 人性课程节选

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