他开始工作时做保安员。

He started work as a security guard.

《牛津词典》

他们开始工作时就丧失了享受福利的权利。

They lose their entitlement to welfare when they start work.

《柯林斯英汉双解大词典》

包好在路上或是开始工作时要吃的东西。

Pack something to eat on the road or when you first get to work.

youdao

So, I mentioned at the beginning, while he was working with this radium bromide that I was very relieved to see that it did not kill him to do these experiments.

我在最开始就说了，由于他工作时接触到了溴化镭,我非常欣慰的,看到它做这些实验。

麻省理工公开课 - 化学原理课程节选

I need a contract that says, here's what I want in terms of things that you're going to take as input, to begin your part of the drama, here's what you're going to produce at the output, and the details of what they do inside are up to them.

这些作家相互沟通进行工作呢？,我需要一封规格说明书,我需要一份合约，上面列出了我想要你做的事，这些是你要再开始时做的输入,这些是你要的输出,细节工作就取决于它们了。

麻省理工公开课 - 计算机科学及编程导论课程节选