Butyraldehyde 1,2 proparediol acetal was synthesized by using stannous chloride as catalyst.以非质子酸氯化亚锡为催化剂,催化合成了丁醛-1,2-丙二醇缩醛.Butyraldehyde 1,2 propanediol acetal was synthesized by using stannous chloride as catalyst.以非质子...
The necessary material of 2 - ( 2 - methoethyl ) acetaldehyde diethyl acetal was synthesized in addition.另外还合成了必需原料 2- ( 2- 甲氧基乙氧基 ) 乙醛二乙醇缩醛.Butyraldehyde 1,2 propanediol acetal was synthesized by using stannous chloride...
In macroprocess system, that part of macrodefinition which forms instruction format generated by the macroinstruction.在宏加工系统中, 建立由宏指令生成的指令格式的那部分宏定义....
狂风大作，海面上波浪起伏。A gale was blowing and the sea was choppy.第3波浪太大了，把我打了回去。The third wave was so strong it knocked me backwards.一阵微风吹下山坡，使青草如波浪起伏。A gust of breeze moved down the hillside, ruffling the grass....
The notary, sitting in his corner , watched the abbe's placidly.公证人坐在一旁,神色泰然地望着神父.Fate chooses your relatives, you choose your friends Abbe Jacques Delille.亲戚乃命定, 朋友靠选择.--德力尔.The relation amongst composition, densit...