It was originally obtained by decarboxylation of benzoic acid.它最先是由苯甲酸脱羧而得到的.The uses and synthetic methods on 2,4 - Dichloro - 5 - Fluoro - benzoic acid were described in detail.简要概述了2,4-二氯-5-氟苯甲酸的用途及其合成方法.Join the 1 % ...
The stationmaster pounced and wrestled the gun from him.站长猛扑过去，奋力夺下他手中的枪。He pounced on the photographer, beat him up and smashed his camera.他突然扑向摄影师，痛打了他一顿，还摔碎了他的照相机。As soon as I opened my mouth, the teacher pounced on m...