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 ...
The storms had abated by the time they rounded Cape Horn.他们绕过合恩角时，暴风雨已经减弱。Storms have been hitting almost all of Britain recently.最近几乎整个英国都受到了暴风雨的侵袭。Their plane had been severely buffeted by storms.他们的飞机遭受到风暴的重创。...
Prices have been cut by developers anxious to offload unsold apartments.急于脱手未售出公寓的开发商降低了房价。The brochure offers a wide choice of hotels, apartments and holiday homes.这本小册子提供了很多宾馆、公寓、度假屋供选择。"Oh, those new apartments are re...