Four officers were told to go off duty and rest at home.四名官员已经被通知停职在家休整。He heard the alarm go off.他听见警报响了。I started to go off the idea.我开始对这一想法失去兴趣了。...
采用高效液相色谱方法测定盐酸麻黄碱的含量.The content of ephedrine hydrochloride was determined by HPLC.采用旋光法测定盐酸麻黄碱含量.Optical rotation was used to determine the content of ephedrine hydrochloride.目的开发一种含有氯雷他定和麻黄碱的复方鼻腔给药新制剂.Aim To prepare a ...