也许他们工作很努力——他们在这里似乎看上去不太用功，但他们很友好。

Perhaps they're working hard—they don't appear to be very studious here, but they are very friendly.

youdao

他们工作很努力，教我们很好。

They work hard and teach us very well.

youdao

他们工作很努力，但总不能高效工作。

Try hard as they will, they never seem able to do the work efficiently.

youdao

But they are working hard. I think they're doing the best from them.

但他们很努力工作。我觉得他们在尽自己最大努力。

唐人街的美食 - SpeakingMax英语口语达人