My boss is very diligent.

我的老板很勤勉。

youdao

Because he's very diligent and intelligent.

因为他既勤奋又聪明。

youdao

He was very diligent; even on holidays, he preferred doing something to doing nothing.

他很勤劳，即使在假日里，他也宁愿做点什么事，而不愿闲着。

youdao

And besides that, lest that not be enough to make sure everyone can succeed in a course like this, we have a very diligent teaching fellow who not only likes to scribe the courses lectures.

另外，为了让大家都能,学好这门课，我们有一个很勤奋的助教,他很乐意记录下课程教案。

哈佛公开课 - 计算机科学课程节选

So, therefore, we are going be very diligent with our visas and observant with the behavior of people who come to this country.

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"We've been very diligent to maintain this building as a pure crime scene with no to little entry inside the building, " he said.

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Clearly the right answer here is to be very diligent.

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