我最近第一次完成了马拉松赛跑，我发现跑步比我预想的更有价值。

I recently finished my first marathon and found running much more rewarding than I ever could have expected.

youdao

我第一次完成这个实验的时候是29岁，当时我正在经历一场非常痛苦的分手。

I first came across this study when I was 29 and I was going through a really difficult breakup.

youdao

在你第一次完成一个东西之前，你常常不真正明白关机的所在。（重构啊，重构）

You often don't really understand the problem until after the first time you implement a solution.

youdao

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

So first time through the loop, the answer is a. Second time it-sorry, as it enters the loop, at the time it enter exits a the answer is a.

当第一次完成循环的时候，答案是a，第二次，对不起，在第一次进入循环的时候,答案就是。

麻省理工公开课 - 计算机科学及编程导论课程节选