胺能参加与卤代烷的亲核取代反应.Amines can engage in nucleophile substitution reaction with alky.这个反应称为Hofman消除反应, 它很像卤代烷的脱卤化氢反应.This reaction, called the Hofman elimination, is quite analogous to the dehydrohalogenation of an alkyl hal...
黄昏时分, 姑娘们穿着灰色网纱衫.Evening hours, girls in grey gauze.江苏飞跃网纱织造有限公司是生产玻璃纤维涂塑窗纱及网格布专业厂家.Glass Cleaner is a ready - to - use glass cleanerglass window , mirrors , plastic and glossy painted surfaces.本公司除供应质优产品外, 另外还经营各种印刷器材如丝...
He's always grousing about the workload.他总是抱怨工作量大.The group are grousing about the service in the hotel restaurant.旅游团对这家饭店餐厅的服务质量抱怨颇多.Just under one third said grousing was intheFrench temperament.近三分之一的人说法国人爱发牢骚是性...
Don't be too downhearted. There's always a way.别太悲观了，总有办法的。Max sighed, sounding even more downhearted.马克斯叹了口气，听上去更沮丧了。We're disappointed by these results but we're not downhearted.我们对结果感到失望，但是并未丧失信心。...
A bird in the hand is worth two in the bush.一鸟在手,胜于二鸟在林.A bird in the hand worth two in the bush.二鸟在林,不如一鸟在手.A bird in the hand , I thought, and accepted his offer.我想多得不如现得, 就卖给他了....