I told him he was probably working too hard in the lab, and needed a vacation.

我对哥哥说他一定是在实验室里太辛劳了，需要放假。

youdao

The intern must be very hardworking and fast at working — translations are often needed urgently so the intern must be willing to work hard.

实习生必须非常勤奋并能快速适应工作——往往需要翻译的东西很紧急，因此实习生必须愿意努力工作。

youdao

I needed a game like this to get my confidence back. Now it's time to keep working hard and keep improving each game.

我需要这样的比赛来找回我的自信，现在我要继续努力，争取每场比赛都不断进步。

youdao

Mr Giuliani brought both a vision of a safe, attractive, hard-working city and a mastery of the detail needed to implement it.

ECONOMIST: Lexington