This is not the first time the military has done an offensive in the tribal region.

VOA: standard.2009.10.17

Suppose the Milgram experiment had never been done and it was being done for the first time here.

假设米尔格林姆实验从来没有执行过,今天才第一次做这个实验。

耶鲁公开课 - 心理学导论课程节选

So it was really cool because it was the first time this play had ever been done,

真是太酷了，因为这部戏剧是第一次在舞台上完成，

记忆犹新的表演 - SpeakingMax英语口语达人

This is the first time I've ever done that before.

这是我第一次这么做。

I'm frustrated 实战 - SpeakingMax英语口语达人