提出了一种干柱层析法 分离提纯 试剂对氨基偶氮苯的新方法.A new method for separating and purifying p - AAB ( p - aminoazobenzene ) by dry - column chromatography is developed.偶氮苯侧链液晶聚合物.Azobenzene side - chain liquid crystalline.必须通过偶氮,(苯)酚类,有机氯试剂,...
粘土矿物能催化脱羧基作用是早已认识到的问题.The ability of clay minerals to catalyse decarboxylation has long been recognised.这些部位包括羧基 、 羰基 、 环氧基和氨基等.These sites include, carboxyl, epoxy, amino and the like.结果表明,燕化公司研究院研制生产的YH -05 羧基丁苯胶乳各项性能指...
顾客付费后登录系统和其他用户聊天。Customers pay to log on and gossip with other users.请登录我们的网站www.cobuild.collins.co.uk查看。Check out our website at www.cobuild.collins.co.uk.登录哈默网络联盟，就会找到另外12个专门播放恐怖电影的网站。Log on to the Hammer Web ring, wit...
parlous state危险的状态But the parlous state of the world economy demands nothing less.但是世界经济的危机要求的会更多.There have five rooms two parlous and two toilets.在那里有五个房间二危险的和二厕所....the parlous state of our economy.我们经济的严峻形势She is par...
It isn't always easy to separate the wheat from the chaff.分清良莠并不总是很容易。An old bird is not to be caught with chaff.谷壳捉不到老鸟.Old birds are not to be caught with chaff.有经验的人不易受骗上当....
The rivers here teem with fish.这里的河流中有大量的鱼.The earth's tropics teem with species.地球上的热带地区物种繁多.Fish teem in this stream.这条小河里鱼很多.Fish teem in the river.这条河中鱼很多.Hippopotamuses teem in this river.这条河里有很多河马.Unlike, say ...
当她在桌前坐下时，却发现自己不知道该说些什么了。When she sat down at her desk she found that the words evaded her.坐下时我的腿还会痛。My leg still aches when I sit down.他的滑雪板交叉在一起坐下时,姿势很不雅观.His skis crossed and he sat down in a most undignified manner....
Dennis had recently begun a successful career conducting opera in Europe...丹尼斯最近开始在欧洲担任歌剧指挥，事业发展得很成功。Dennis had recently begun a successful career conducting opera.丹尼斯最近开始从事歌剧指挥的工作,并且非常成功。Dennis had recently begun a succ...