她第一次接受体外受精时，那还是一个比较新的方法。

When she first underwent IVF it was still a relatively new procedure.

《柯林斯英汉双解大词典》

当她还是个小孩子的时候，就学会了演奏乐器，并在9岁时举行了她的第一次公开独奏会。

She learned to play the instrument when she was a small child and gave her first public recital at age 9.

youdao

他们发现，这么长时间之后，鱼还是会游到它们第一次获得食物的地方。

They found that after such a long break the fish still went to the same place where they first got food.

youdao

And I end up going back and doing unit testing anyway, to try and figure out why it doesn't work. So over the years, I've just convinced myself I might as well start where I'm going to end up.

第一次从来不会正常运行,因此无论如何我还要回头去做单元测试,找找哪儿出错了，因此经过这么多年，我已经说服自己既然一定要做单元测试,那么还是一开始就做最好了。

麻省理工公开课 - 计算机科学及编程导论课程节选

Actually, it's the first time I've seen him since the end of my senior which was about a year ago.

其实，自从大三之后我还是第一次见他，是一年前的事了。

我尊敬的教授 - SpeakingMax英语口语达人

He grew up in the waning years, the last years, of the Elizabethan era, and he was a boy when Shakespeare's most famous plays were first performed.

他成长在，伊丽莎白时代的衰落期，最后几年，当莎士比亚著名的戏剧第一次被搬上舞台时,他还是个男孩。

耶鲁公开课 - 政治哲学导论课程节选