商店开门营业的时候，我开始了我的第一个工作岗位在商店的大门口迎接顾客。

At opening time I take up my first position, greeting customers near the main entrance.

youdao

那是我毕业后的第一个工作。

It was my first job after graduation.

《牛津词典》

And, by the way, this business on working on every problem is important because I have seen some people who start working on number one, but that is not their strong suit.

另外，解决每个问题的事情,是很重要的,因为我看到一些人,从第一个开始工作，但这不是他们的强项。

麻省理工公开课 - 固态化学导论课程节选

So one, is obviously the filename that I've been working on.

第一个，显然是我所工作的,文件名。

哈佛公开课 - 计算机科学课程节选