Medicine intermediate N - ethylethylenediamine ( NEED ) was synthesized from acrylamide and ethylamine by addition reaction and Hofmann rearrangement. 以丙烯酰胺为起始原料,经乙胺加成后,再经Hofmann重排两步反应后合成了药物中间体N - 乙基乙二胺 ( NEED ).
餐馆最近出售野禽的菜肴, 卖得很好.The restaurant sells dishes made of wild fowl , they sell well.适合搭配口味偏辣的红肉 、 野禽及婪乳酪.Very spicy red game bird meat, ripe cheese.这个公园几年前还是一块美妙的湿地, 到处是涉禽和野禽.This was , until a few years ago, a wonderful we...
阀座密封负载和紧密性与反压力相关.Seating load and tightness is dependent on back pressure.不要安装在可能发生反压力的地方.Do not install where backpressure can occur.止回阀模块结构应该包括内 置 止动限止器,防止由于反压力造成阀瓣磨损.Check module construction shall include built - in ...
The dress exaggerates her wasp waist and enlarges her bosom.那件连衣裙凸显了她的蜂腰，也让她的胸部看起来更丰满。She lay on the bed, her eyes closed and her bosom palpitating.她躺在床上，闭着眼，胸部起伏不定。We, at least, have taken her to our bosom.至少我们对她是关爱有加的。...
Governors are using the increased powers given to them to act against incompetent headteachers.董事们运用赋予他们的更大权力罢免不称职的校长。Headteachers are more involved in administration than in teaching.校长的行政工作比教学工作多....
Lunar probe has successfully passed the test temperature.月球探测器已经成功通过恒温测试.In the new century, impressive achievements have been scored in manned spaceflight and lunar probe projects.进入新世纪, 我们又在载人航天与探月工程领域取得了令世人瞩目的重大进展....
She sat on Rossi's knee as he whispered in her ear.她坐在罗西的膝盖上，听他低声耳语。He had to have one leg amputated above the knee.他的一条腿不得不从膝部以上截断。The knee's coming on fine, I'm walking comfortably already.膝盖恢复得很好，我现在走路已...