采用1,4- 丁二醇 、 马来酸酐及十八醇为主要原料,合成出一种双子表面活性剂1, 4- 丁二醇双琥珀酸十八醇双酯磺酸钠.A new type gemini surfactant was synthesized from 1,4 - butanediol , maleic anhydride and 1 - octadecanol.研究了加入聚对苯二甲酸丁二醇酯(PBT) 对酚醛塑料的增韧改性.A phenolic resin was ...
There is nothing in the rules of grammar to suggest that ending a sentence with a preposition is wrong.语法规则中并没有规定句子以介词结尾是错误的。...the difference between Sanskrit and English grammar.梵文语法与英文语法的区别Beginners are too apt to mak...
中世纪时，drab（“本色布”）一词指的是一种农民用来制衣的非常普通的羊毛织物。In the Middle Ages the term "drab" denoted a very simple type of woollen cloth which was used by peasants to make their clothes.第七届广州国际纺织及制衣工业展览会开幕仪式现在开始!The opening ceremony of Ca...
She watches him plane the surface of a walnut board.她看着他刨平一块胡桃木板。The stool comes in several sizes in walnut or mahogany.凳子有几种尺寸，材质分胡桃木和红木两种。Black walnut is extremely sensitive to damage from late spring frosts.黑胡桃对春天晚霜的危...
The organization publishes a regular digest of environmental statistics.该组织定期出版一份环境统计数据摘要。The newspaper publishes a profile of a leading sportsman every week.该报每周刊登一篇关于一名优秀运动员的简介.Today our paper publishes its 10000 th nu...