Aspirin is synthesized through O - acylating reaction from acid and anhydride acid with anhydrous carbonate as catalyst.以水杨酸和乙酸酐为原料,采用无水碳酸钠作为催化剂经O - 酰化反应合成了阿司匹林.In 2002, we develop Photo - catalyst & electronic Ionizer A...
我从他那里学到了许多关于经营乐队方面的东西.I learned a lot from him about how to run a band.她在世界各地跳过舞、编过舞、讲过学、也教过书。She has danced, choreographed, lectured and taught all over the world.你在学生时代学到什么东西了吗？Did you learn anything in your day, as a ...
In the cosy consulting room the children are surrounded by familiar objects.在温馨的诊疗室里，孩子们周围摆满了亲切熟悉的东西。Enviros Consulting has a client base of more than 2,000 organisations worldwide.EnvirosConsulting公司在全世界拥有逾2,000家组织机构的客户...
He wrenched off his sneakers.他使劲儿脱下运动鞋。He wore an outlandish outfit of pink pants and green sneakers.他穿了一套稀奇古怪的衣装, 粉红色裤子、绿色旅游鞋。General field MBT sneakers are more sensible choice.一般的野外MBT运动鞋是较为明智的选择.Robert Redford is bac...