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。
Her show now has a hard political edge to it.
她现在的表演具有强烈的`政治性。
Their success was the result of years of hard graft.
他们的成功是多年艰苦奋斗的结果。