(a) collapse 塌下; 坍塌
*The ceiling came down. 天花板塌了.
(b) (of rain, snow, etc) fall （指雨、雪等）落下
*The rain came down in torrents. 下着倾盆大雨.
(c) (of an aircraft) land or fall from the sky （指飞行器）着陆, 从空中掉下
*We were forced to come down in a field. 我们被迫在田地里着陆.
* Two of our fighters came down inside enemy lines. 我方有两架战斗机坠落在敌方.
(d) (of prices, the temperature, etc) become lower; fall （指价格、温度等）降低; 下降
*The price of petrol is coming down/Petrol is coming down in price. 汽油价格在下跌. come `down (from...) (Brit) leave a university (esp Oxford or Cambridge) after finishing one's studies 大学毕业（尤指于牛津或剑桥）
*When did you come down (from Oxford)? 你什么时候（从牛津）大学毕业的? come down (from...) (to...) come from one place to another, esp from the North of England to London, or from a city or large town to a smaller place 从一处来到另一处（尤指从英格兰北部到伦敦或由城镇到较小的地方）
*We hope to come down to London next week. 我们希望下星期南下到伦敦.
* They've recently come down from London to live in the village. 他们最近已经从伦敦搬到乡村来住. come `down on sb (infml 口)
(a) criticize sb severely; rebuke sb 申斥某人; 训斥某人
*Don't come down too hard on her. 不要太严厉地申斥她.
(b) punish sb 惩罚某人
*The courts are coming down heavily on young offenders. 法庭从严惩处年轻罪犯. come down on sb for sth (infml 口) demand (payment or money) from sb 向某人索取（报酬或钱）
*His creditors came down on him for prompt payment of his bills. 债权人催他尽快付帐. come down to sb be passed from one generation to another 一代传一代
*stories that came down to us from our forefathers 祖祖辈辈传下来的故事. come down to sth/doing sth (infml 口) be forced by poverty, etc to do sth that one would never do normally; be reduced to sth 因贫穷等被迫去做正常情况下决不做的事; 沦落为...
*He had come down to begging. 他已沦为乞丐. come down to sth
(a) reach as far down as (a specified point) 下垂到（某一点）
*Her hair comes down to her waist. 她的头发垂到腰部.
(b) be able to be summarized as sth; be a question of sth 可归结为某事物; 是某事物的问题
*It comes down to two choices
*you either improve your work, or you leave. 归结起来有两条出路
*你或者改进工作, 或者辞职.
* The whole dispute comes down to a power struggle between management and trade unions. 全部争论其实就是资方与工会间的权力斗争. come down with sth become ill with (an illness) 得某病; 因某病病倒
*I came down with flu and was unable to go to work. 我得了流感, 不能去上班.