When I left they were all still hard at it.

　　我離開的時候他們都還在努力工作。

　　You think you're really hard, don't you?

　　你是不是以為自己真的很勇猛？

　　Come and get me if you think you're hard enough.

　　你要是覺得自己有種，就沖著我來吧。

　　Her show now has a hard political edge to it.

　　她現在的表演具有強烈的政治性。

　　Their success was the result of years of hard graft.

　　他們的成功是多年艱苦奮斗的結果。