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 ...
For speed we used packets of pizza dough mix...为了节约时间，我们用了几包做比萨饼的混合面粉。John advised Peter to get out and mix more with people.约翰劝彼得出去参加社交活动, 多跟人们往来。You can mix blue and yellow paint to make green one.你可以把蓝色和黄色油漆混合成绿色。Mix ...
The underlying theme of the novel is very serious.小说隐含的主题是十分严肃的。The result does not exclude the possible coexistence of an underlying lung cancer.化验结果并不能排出潜在合并肺癌的可能性.To stop a problem you have to understand its underlyin...