The effect of acidity on synthesis of phenylbiguanide additive reaction of aniline with dicyandiamide was studied.研究了酸度对苯胺与双氰胺加成反应生成苯基双胍的影响.Major Composite of thc SeaIant is bisphenol A epoxy resin, dicyandiamide, ureido...
I followed his big hulk into the house.我跟在他魁梧的身躯后面进了屋子。the hulk of a wrecked ship遇难轮船的残骸I could make out the gutted hulk of the tanker.我可以辨认出油船破烂不堪的残骸。...
The teeth of the ruminant are specialised, unlike those of a carnivorous animal.反刍家畜的牙齿很特殊, 完全不同于肉食动物.The third division of the stomach a ruminant animal, located between the abomasum and the reticulum.重瓣胃反刍动物的第三胃, 位于皱胃和...