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。