Propyl glycidyl ether ( PGE ) was obtained from propyl alcohol and epichlorohydrin by phase - transfer catalysis.以环氧氯丙烷和正丙醇为原料,通过相转移催化法合成了正丙基缩水甘油醚.The FBC ( fluorous biphase catalysis ) is a new nonaqueous immobilization...
In specific acid catalysis, the undissociated acids do not contribute.在特殊的酸催化中, 不离解的酸不起作用.The corresponding reaction of acetaldehyde is subject to general base catalysis.乙醛相应的反应服从广义的碱催化.Catalysis has increased the rate o...
Camomile , Benzoin , Lavender, aloe oil and so on.蓝甘菊、安息香 、 薰衣草 、 芦荟油等.Other fixatives which may be used include the oleoresins such as benzoin, or styrax.其他可用的固定剂有苯偶姻或安息香等含油树脂.Dry oxidation of benzoin with air under mic...
山坡下面，野山羊咩咩地轻声叫着。From the slope below, the wild goats bleated faintly.我数了数，有34只野山羊在啃草。I counted 34 wild goats grazing.在集市上,鸡 、 山羊和兔子被摆出来作物物交换之用.Chickens, goats and rabbits were offered for barter at the bazaar....
我从十四岁时起就不得不照料自己.I've had to fend for myself since I was 14.一队学生鱼贯而入, 共有十四五个人.A group of students filed in, fourteen or fifteen all told.二十四 小时为一日.Twenty - four hours make a day....