方法: 以甲醇为溶剂,以对羟基苯乙酮和溴为原料制备了α - 溴-4-苄氧苯基苯乙酮.Methods: α - Bromo - 4 - benzyloxy acetophenone is synthesized with 4 - hydroxy acetophenone and bromonium as materials and methanol as solvent.目的探讨西替利嗪的中间体1-犤 ( 4- 氯苯基 ) 苯甲基 犦 -...

The cuckoo lays its eggs in other birds’ nests.杜鹃在别的鸟巢中产卵。The cuckoo lays its eggs in other birds'nests.杜鹃在别的鸟巢中产卵.It is best to stifle curiosity and leave birds' nests alone...最好能克制住好奇心，不要去碰鸟巢。Some would build...

There's more than a grain of truth in that.其中含有很深刻的道理。Our observations may contain a grain of truth for you to refer to.我们的意见也许会有千虑一得之处,供你参考.There isn't a grain of truth in what he said.他说的全不是真话....

The convention establishing CERN ( European Organization for Nuclear Research ) is signed.1954年的今天,创建CERN ( 欧洲核子研究组织 ) 的公约被签定.Access through a CERN proxy server is limited to viewing or downloading files.通过CERN代理服务器访问将只能...

He was quite favourably impressed with the new French commander.他对新的法国指挥官印象很好。We would view favourably any sensible suggestion for maintaining the business.我们欢迎为维持业务稳定而提出的所有合理建议。The play has been favourably commented by ...

Minimal intervention allows the ecologies to adapt itself to a more natural balance condition.最小的干预能使生态系统通过自我调整达到更自然的平衡状态.In the long view, ecologies are temporary networks.长远来看, 生态群是临时性的网络.Global ecological efforts can ...

病历表用纸都已经用完了.All case history sheet paper has been used up.同学须缴交病历表.Students should hand in the anamnesis record sheet.请您把病历表填好,行 吗 ?Will you fill out this medical history form?...

He often works by rule of thumb.他通常凭经验办事.As a rule of thumb, a cup of filter coffee contains about 80mg of caffeine.凭经验估计，一杯过滤咖啡约含80毫克咖啡因。A good rule of thumb is that a broker must generate sales of ten times his salary ...

人群中走出一人向将军敬礼。One of the company stepped out and saluted the General.身为少尉，他几乎是逢人便得敬礼。As a second lieutenant, he had to salute damned near everybody.两名士兵立即进来敬礼。Two soldiers entered at the double and saluted....

这家伙, 不认识啦.她望着他怔怔的神情, 好笑地想.Look at this guy, she thought, amused, looking at his blank expression.Simon又惊奇又好笑地大笑了起来.Simon laughed with as much surprise as amusement....

Yasin had seriously hurt himself while trying to escape from the police.亚辛试图从警察手中逃脱时受了重伤。These gases would seriously damage the patient's respiratory system.这些毒气会严重损害患者的呼吸系统。In November 1941 Payne was seriously ill ...

The average life expectancy was 40.平均期望寿命曾是40岁。Three of the six have comfortably exceeded their normal life expectancy.6人中已经有3人轻松超过了正常的预期寿命。We were tense with expectancy.我们因期待而神经紧张起来。Pollution shortens considerably the l...

他们结婚不久汤姆便露出了他的凶恶本性.Shortly after they became man and wife Tom began to show the cloven foot.天生的黑皮肤, 忧郁使他看上去有点凶恶.Naturally dark of skin, gloom made him look slightly sinister.一边是炉子里的熊熊烈火, 一边是布拉西那对凶恶的眼睛.There were the flam...

消防员花了两个小时才把传动带切断，把他救了出来。It took firemen two hours to cut through the drive belt to free him.转盘由一根传动带与电机相连。The turning disc is connected by a drive belt to an electric motor.车厢的传动带又通常称之为动力传动系统.The train of the car can is ...

她轻快地走着, 湛蓝的天空好像在她心里灌注了蓝色的液体.She tripped along, the clear sky pouring liquid blue into her soul.相当量的血浆持续灌注到肾脏.Adequate quantities of plasma continued to perfuse the kidney.她的身体,仿佛把青春与活力灌注到他的身上.Her body seemed to be pourin...

On Saturday we fished the River Arno.周六我们在阿尔诺河钓鱼。The Arno would suffice as a river if only it had some water.阿尔诺河要是有些水的话可以称为河流.From Florence the river Arno ran down to Pisa, and then it reached the sea.阿诺河从佛罗伦萨流经比萨入海....

It would dishonour my family if I didn't wear the veil.如果我不戴面纱就会有辱门楣。There's no dishonour in losing.失败并不是耻辱.Death was considered vastly preferable to dishonour.可杀不可辱....

Other amenities, less commonly available, include a library and exercise room.还有一些不太常有的设施，包括图书馆和健身房。Parsley is probably the most commonly used of all herbs.欧芹可能是用得最多的一种药草。A little adolescent rebellion is commonly believe...

An old steed in the stable still aspires to gallop a thousand li.老骥伏枥,志在千里.The fame to which he aspires was beyond his reach.他追求的名誉乃是他所不能及的.Alcoa Aspires to be the best company in the world.美铝立志成为世界上最好的公司.He works very h...

结果盐酸乙胺丁醇 、 利福平、吡嗪酰胺和异烟肼均具有良好的色谱行为.Results Ethambutol hydrochloride, isoniazid, pyrazinamide and rifampicin all had good chromatographic behavior.异烟肼有片剂和糖浆两种,口服.Isoniazid comes as a tablet and a syrup to take by mouth.异烟肼...

carelessly throwing a lighted cigarette in the litter bin随意把未灭的香烟扔进垃圾桶He emptied several bags of rice into a bin.他把几袋米倒进大箱里.He threw the empty bottles in the bin.他把空瓶子扔进垃圾箱。Do you need to keep these letters or shall we b...

In the evening a log fire would provide cosiness.晚上点起篝火会让人感到温暖舒适。Customers pay to log on and gossip with other users.顾客付费后登录系统和其他用户聊天。I set the log on the ground and shaved off the bark.我将原木放到了地上，刨掉了树皮。...

Slight dalliance with her makes the very diminutive seem as big as life.与她稍作嬉戏就会使无足轻重的小事变得性命攸关.His digamous wife is very virtuous, which makes him envied by others.他的后妻很贤惠, 这让他很受人羡慕.Losing a lot of blood makes you tired ...

The ferocious panther is chasing a rabbit.那只凶猛的豹子正追赶一只兔子.The panther is running in the jungle.那只黑豹正在丛林中奔跑。The ferocious panther is chasing a deer.那只凶猛的豹子正追赶一只鹿。...

The yacht has sprung a leak in the hull.帆船的船体上出现了一条裂缝。In May engineers found a leak in a hydrogen fuel line.5月份工程师们在一条氢燃料管线上发现一条裂隙。The blood vessels may leak fluid, which distorts vision.血管可能会渗漏，造成视力模糊。...

Failure is never quite so frightening as regret do.比失败更令人恐惧的是懊悔。He plays some passages so slowly that they become lugubrious.有些段落他演奏得异常徐缓，听上去有些忧伤。Fresh fruits and vegetables are important and so is bran.新鲜的水果和蔬菜很重要，麦麸也是。...

她小时候是个羞怯的丑小鸭。She was a shy, ugly duckling of a child.他是个离群索居、胆小羞怯的家伙。He is a reclusive, timorous creature.她羞怯的举止迥然不同于妓女的惺惺作态.In the diffident manner was nothing of the art of the courtesan....

The champagne-soaked event took over the city's main thoroughfare.该市的大街上到处香槟飘香，盛事热闹非凡。Don't park your car on a busy thoroughfare.不要把你的车停在繁忙的大街上.Road under repair. No thoroughfare.翻修路面, 禁止车辆来往....

The crowds had been soaked and were now nicely drying out.这群人都浑身湿透，现在谢天谢地快晾干了。He's just written a book, nicely illustrated and not too technical.他刚写完一本书，插图精美，内容也并不艰涩。She has a bit of private money, so they manage qu...

这块地从草木茂盛的狭长地带一直伸展开来。The land sweeps away from long areas of greenery.荨麻在任何肥沃的荒地上都能茂盛地生长。Nettle grows plentifully on any rich waste ground.这片丘岭草木茂盛，郁郁葱葱。The hills are covered in lush green vegetation....