Chlorination is carried out with Nhaloamines and sulfuric acid.氯化是用N- 卤胺和硫酸.The practice of chlorination has become so widespread.氯化法在实践中已得到广泛应用.The process of 2 - chloropyridine chlorination synthesis by pyridine and ap...
一只大盘子直向听差的脑袋飞来.A large plate came skimming out , straight at the footman's head.我打了铃, 吩咐听差把我的旅行皮包收拾好.I rang the bell, and directed my servant to pack my portmanteau.秘书们和身穿制服的听差们步履轻徐,一如太平年月.Secretaries and uniformed ...
We remember our mother's stern instructions not to boast.我们谨记母亲不许我们在人前炫耀的严厉教诲。His statement isn't merely an idle boast.他的话不仅仅是虚张声势的自夸。I don't want to boast, but I can actually speak six languages.不是我吹嘘，我确实...