这是因为氯磺化反应存在位阻效应的缘故.This was due to hindered reaction in the chlorosulfonation.气体有效浓度增加,氯磺化反应速率增加,氯气和二氧化硫的体积配比以1∶1为佳.The rate of chlorosulfonation increased with increasing concentration of the gaseous mixture.而氯磺化聚乙烯产品具有...
The worst reason to launch an attack would be a fear of seeming irresolute...因为担心看上去缺乏决断力就发动攻击，这是最糟糕的理由。His opponents were still obsessed by his seeming invulnerability.他的对手还仍然对他表面上的坚不可摧感到棘手.Wall Street analysts have bee...
The show will be open to the public at 2pm; admission will be 50p...演出下午两点开始，入场费50便士。By his own admission, he evaded taxes as a Florida real-estate speculator.他亲口承认自己在佛罗里达从事房地产投机生意时逃过税。A clever lawyer can cozen the priso...