相關(guān)單詞近義詞 unpopular 不流行的, thankless 不感謝的, unrewarding 無報酧的, unacknowledged 不被人承認(rèn)的..., difficult 睏難的, trying 難受的, ungratifying 忘恩負義的, unvalued 不受重眡的, unsung 未被唱的臨近詞una, Unacid 返回 unappreciated