(of rain, snow, good weather, etc) continue without stopping （指雨、雪、好天气等）持续不停
*Let's hope the sunny weather keeps up for Saturday's tennis match. 但愿星期六网球比赛时还是这样的好天气. keep sb up prevent sb from going to bed 使某人不能去睡觉
*I do hope we're not keeping you up. 我希望我们没有耽误你睡觉. keep sth up
(a) prevent sth from falling down 使某物不落下
*wear a belt to keep one's trousers up 系 腰带以系住裤子.
(b) cause sth to remain at a high level 使某事物处于高水平
*The high cost of raw materials is keeping prices up. 原料费用昂贵使得产品价格居高不下.
(c) not allow (one's spirits, strength, etc) to decline; maintain 不让（精力等）衰退; 维持; 保持
*They sang songs to keep their morale up. 他们唱 歌以保持高昂的士气.
(d) continue sth at the same (usu high) level 继续使某事物保持同样的（通常指高的）水平
*The enemy kept up their bombardment day and night. 敌军一直日夜不停地狂轰滥炸.
* We're having difficulty keeping up our mortgage payments. 我们难以继续支付分期偿还的抵押贷款.
* You're all doing a splendid job; keep up the good work! 你们干得都很出色, 要坚持下去!
(e) continue to practise or observe sth 照旧做某事物或遵守某事
*keep up old customs, traditions, etc 沿袭古老的风俗、传统等
* Do you still keep up your Spanish? 你仍在学西班牙语吗?
(f) maintain (a house, garden, etc) in good condition by spending money or energy on it 保养, 维修（房屋、花园等）
*The house is becoming too expensive for them to keep up. 他们的房子维修费用贵得越来越修不起了. Cf 参看 upkeep. keep `up (with sb/sth) move or progress at the same rate (as sb/sth) 跟上（某人[某事物]）; （与某人[某事物]）同步前进
*Slow down I can't keep up (with you)! 慢点, 我跟不上（你）了!
* I can't keep up with all the changes in computer technology. 计算机技术的各种改进有些我已跟不上了. keep up (with sth) rise at the same rate (as sth) 以（某事物的）同样速率上升
*Workers' incomes are not keeping up with inflation. 工人的收入赶不上通货膨胀. keep up with sb continue to be in contact with sb 保持与某人的联系
*How many of your old school friends do you keep up with? 你和中学时的老同学保持联系的有多少? keep up with sth inform oneself or learn about (the news, current events, etc) 知悉（消息）; 跟上（形势）
*She likes to keep up with the latest fashions. 她喜欢穿戴入时.