cut up, cut down分别什么意思，详细点，谢谢

cut up (布料等)裁得出This piece of material may be cut up to make a pair of trousers.这块布料可以裁一条裤子。That piece of cloth will cut up into a jacket.那块布料可以裁成一件外套。切碎, 切割开Let's cut up the chicken and make some soup.我们把鸡剁成块煮汤吧。砍伤, 使…受伤; 毁坏The heavy truck cut up the new lawn.新草坪被重型卡车辗得伤痕累累。Her younger brother was cut up by a robber last week.她弟弟上周被歹徒砍伤。恶作剧, 胡闹He often cut up in public.他常常当众胡闹。对…吹毛求疵, 抨击The film was severely cut up by many reviewers.这部电影受到许多评论者的严厉批评。使悲痛, 使伤心His son's death cut him up badly.他儿子的死使他十分难过。 cut down 把…砍倒〔割掉〕He cut the tree down.他砍倒了这棵树。She cut the grass down.她把草割掉。裁短, 改小My sister cut father's coat down to fit me.我的姐姐按我的身材把父亲的上衣裁短了。She is cutting down her dress for her younger sister.她正把自己的衣服改小, 准备给妹妹穿。减少, 降低We were for cutting down the cost of production.我们赞成降低成本。You must cut down on sugar to lose weight.你必须少吃糖以减轻体重。〈非正〉驳倒, 使逊色, 击败He was so eloquent that he cut down the finest orator.他能言善辩, 胜过最好的演说家。Your arguments are too easy to be cut down.你的论点一驳即倒。砍〔杀〕死, 伤害He cut down the snake.他砍死了那条蛇。The soldier was cut down in his youth.这名士兵年纪轻轻就被杀害了。

cut up 切开; 抨击; 切碎
cut down削减; 砍倒; 缩短