My boss is very diligent.

我的老板很勤勉。

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

Watching their working demeanor, they are very diligent, their service very good, appearing when they are called.

只要有人叫服务员，看看他们的服务态度吧，非常认真，服务非常到位。

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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