I also talked last time about smallpox and the perceived need to produce more smallpox vaccine in the event that smallpox is used as a weapon in 2002.

上次我也谈论过了天花,以及在二零零二年天花被当作武器使用时,制造出更多天花疫苗的必要性

耶鲁公开课 - 生物医学工程探索课程节选

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

And what we're actually talking about again is the zeffective. So that z effective felt by the 2 p is going to be less than the z effective felt by the 2 s.

我们实际上所谈论的,所以被2p感觉到的,的有效电荷量,有效电荷量小于2s感觉到。

麻省理工公开课 - 化学原理课程节选