Simone
Up and down 就是起伏、上下的中烂意思。像这一类的词组有很多，例如：1.day and night 日日夜夜例句:I wish he'd desist from entertaining hisfriends at all hours of the day and night.但愿他别再昼夜不分地招待他的朋友.2.then and there 当场,立即例句:I decided to do it then and there.我决定当场立即就做.3.now and then 时而,不时例句:I like to go to the opera now and then.我喜欢偶尔去看歌剧.4.forever and a day 极长扰穗久地,永久地例句：They promised to remain friends forever anda day.他们许诺要永远保持友谊.5.once and for all 彻底地,一劳永逸地例句：It is a revolution that will bury thecapitalist system and all other systems of exploitation once and for all.这是要把资本主义制度和一切剥削制度彻底埋葬的一场革命.6.by and by [,bai əb 'bai] 不久,后来,以后例句:It's very likely to clear up by and by.很可能不久要放晴了.7.by and large 总的来说,大体上,基本上例句:By and large， our work have beensuccessful.总的说我们的工作是成功的.8.come and go 来来去去; 变化不断例句:Fashions come and go but the long dress isalways popular.时装不断变化,但长的服装却永远受到青睐.9.right and left 向左右两边(到处)例句:In word processing,to print a document witheven right and left margins.字(词)处理技术中,使打印文件有平齐的左右空卖李漏白边.
