People tend to work hard at this stage of life.
人在这个人生阶段往往发奋努力。
Her job is hard work, but the pay is good.
她工作虽辛苦，但薪水不低。
When I left they were all still hard at it.
我离开的`时候他们都还在努力工作。
You think you're really hard, don't you?
你是不是以为自己真的很勇猛？
Come and get me if you think you're hard enough.
你要是觉得自己有种，就冲着我来吧。