work hard  努力工作

　　It's been a long day. We worked hard today. 今天真不容易啊。我们工作得很努力。

　　We're working around the clock. 我们昼夜不分地工作着。

　　I'm working hard to become a better man. 我要努力变成一个好男人。

　　You have to work hard. Don't let me down.  你得努力工作了。不要让我失望。

　　I'll do my best, boss. Believe me.  我会尽全力的，老板，请相信我。