The lab assistant was wearing a white overall.

实验室助手穿着一件白罩衣。

《牛津词典》

She worked as a secretary, or rather, a personal assistant.

她当了秘书；确切地讲，是私人助理。

《牛津词典》

She works as a teaching assistant.

她担任助教。

《柯林斯英汉双解大词典》

They want them tried in military court. Charles Allen is with the Department of Homeland Security and is a former CIA Assistant Director.

VOA: standard.2010.01.30

That's why I hope you'll stay with-- you'll each find a teaching assistant and will stay with that person.

这就是为什么我希望...,你们每人都找一位助教,和他多交流

耶鲁公开课 - 金融市场课程节选

I was curious; I was even a user assistant at the time, I was certainly a geek at the time and yet I had no sense really of what actually went on in a classroom like this.

我很好奇，在当时我是一名助教，那时我肯定是一个怪胎,我真的不知道,这样的课上讲的是什么东西。

哈佛公开课 - 计算机科学课程节选

Former Michigan coach Lloyd Carr, a high-school assistant before he became a college assistant, said aspiring college coaches once started in high schools and moved up not long afterward.

WSJ: College Football: The Revenge of the High-School Coach

And now every deputy assistant has got a deputy assistant, and it's just a proliferation of inefficiency overlapping duplication.

CENTERFORSECURITYPOLICY: Center For Security Policy

Four top officials, including an assistant secretary and a deputy assistant secretary, were removed from their jobs as a result.

WSJ: GOP Probes Deeper Into Benghazi Review