Diisopropyl succinate was synthesized from succinic acid and isopropanol with p - methyl benzenesulfonic acid as catalyst.摘要以丁二酸和异丙醇为原料及对甲基苯磺酸为催化剂,催化合成丁二酸二异丙酯.The usual thinners are water, ethanol, isopropanol, ethylene ...
She checked the seating arrangements before the guests filed into the dining-room.在客人们鱼贯进入餐厅之前，她核实了一遍座位安排。Hotels operate a collection service for their guests from the airports.宾馆为客人提供机场接机服务。The subject came up during a ...
When the Berlin Wall came down it wasn't just the roads that opened up but the waterways too.柏林墙一倒，不仅是陆路，连水路也开通了。He accepted the offer to become a professor at the Prussian Academy of Sciences in Berlin.他应聘到柏林普鲁士科学院...