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 product is still only a gleam in an engineer's eye.该产品还只是工程师头脑中尚未成形的想法。There was a gleam in her eye when she looked at me.她朝我看时眼中流露出某种神情。In the light from the hall, her hair had a golden gleam.在大厅灯光的照射下，她的头发闪着金色...
The passing of the years has been kind to Dan. He looks like a man of half his age.岁月对丹很仁慈，他看起来只有他年龄的一半大。At the speed and height at which he was moving, he was never more than half a second from disaster.以这样的速度在这么高的地方移动，...