Preparation of salicylic hydrazide . Controlling material mole ratio and the product recrystallization is the key.水杨 酰肼的制备控制原料的摩尔比、产物的重结晶是关键.A new method for determining hydrazide group introduced to polymethyl acrylate ...
Women are running in nearly all the contested seats in Los Angeles.在洛杉矶，女性参选了几乎所有的竞争席位。They contested for the position of minister of foreign affairs.他们在争夺外交部长的职位.The referee's decision was contested by the loser.负方...
公司耗资数千购买了一套电子订单管理系统。The company invested thousands in an electronic order-control system.这种疾病今年已夺去了数千秘鲁人的生命。The disease has killed thousands of Peruvians this year.他一周之内从这家濒临破产的企业里抽走了数千英镑的资金。He had siphoned thousands of ...