n.有粘性；強(qiáng)硬；強(qiáng)健
All this toughness does not sit well with everyone. 所有這種強(qiáng)硬的做法并非人人都能接受。
He had developed his unusual toughness by working out daily at a gymnasium. 他每天在體操房里頑強(qiáng)地苦練，終于練得非常強(qiáng)健堅(jiān)韌。
