hard本身作形容词。
hardadj.坚固的；坚硬的；结实的；难做的；
adv.努力地;费力地；艰难地
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。
