hard-earned ['hɑ:d'ɜ:nd]

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附加级

a.辛苦挣来的

She attributes her success to hard work and a little luck. 她认为她的成功来自勤劳和一点运气。
After much hard bargaining we reached an agreement. 经过一番艰难的讨价还价，我们达成了协议。