The yields of other cyclic acetals were between 62.并在此条件下合成了多种环缩醛,收率62.Eight acetals ( Ketals ) were synthesized under the optimal conditions.在最佳条件下,合成了八个缩醛 ( 酮 ) 化合物.The hydroxyl groups can be changed into esters , ethe...
The hydroxyl groups can be changed into esters , ethers , acetals and ketals, etc.最常用的羟基保护基可归纳为三类:酯类 、 醚类和缩醛或缩酮类.Eight acetals ( Ketals ) were synthesized under the optimal conditions.在最佳条件下,合成了八个缩醛 ( 酮 ) 化合物.The yields ...
她滤煮好咖啡，然后把羊角面包放进烤箱加热。She percolated the coffee and put croissants in the oven to warm.咖啡正在滤煮,过两分钟就好.Coffee is being perked and will be ready in two minutes.你能闻到正在厨房里滤煮的咖啡味 吗 ?Can you smell the coffee perking in the kitch...
This can holds five liters of water.这个容器可装五升水.We had applied for fumigating holds before the grain sucker came.谷物吸扬机到来之前我们就已申请熏舱了.He still holds out hope that they could be a family again.他对他们再次成为一家人仍抱持希望。The Transport C...
He took a few whiffs, ie of a cigar, pipe, etc.他吸了几口(雪茄 、 烟斗等).A few whiffs of the raw, strong scent of phlox invigorated her.福禄考花的缕缕新鲜、浓重的香味使她充满活力。A few whiffs of the raw , strong scent of phlox invigorated her.福禄考花的缕缕新...
Ferrography technology is a important mean for detecting scale diesel engine trouble.铁谱技术是诊断大型柴油机磨损故障的重要手段.Color information of ferrography image is important to particle identification and wear condition analysis.铁谱图像所包...
Objective To establish a simple and safe method of urethral caruncle resection.目的探寻一种简单、安全的尿道肉阜治疗方法.Caruncle A fleshy outgrowth from a seed, similar to, but smaller than, an aril.种阜:外种皮延伸所形成的结构,与假种皮相似但通常小于假种皮....
She was given some quick training at the vocational school.她在职业学校受过速成训练.Students from vocational school fill the need of the factory for technicians.职业学校毕业的学生填补了这家工厂对技术工人的需求.Our school is based on a nationwide Handan voc...
the obstruction of justice妨碍司法公正The conical configuration of the appendix makes obstruction of the lumen unlikely.阑尾呈圆锥形,不易造成腔内梗阻.Obstruction or occlusion of a blood vessel an embolus.血液流经心脏和血管的运动.Anti - drying, to wrink...
As he talked, an airforce jet screamed over the town.他谈话时，一架军用喷气式飞机在镇子上空呼啸而过。Workers at the plant build the F-16 jet fighter.这个工厂的工人建造F-16喷气式战斗机。The company laid off 65,000 workers after commercial-jet orders dried up.商务...