Through nitrosation , hydrogenate reducion, and acylate three steps, the yield surpass 80 % for the diethyl malonate.收率相对于丙二酸二乙酯达到了80%以上.The necessary material of 2 - ( 2 - methoethyl ) acetaldehyde diethyl acetal was sy...
...the textile and fibre industries that taint the air, poison the water and use vast amounts of natural resources...污染空气、破坏水源并消耗大量自然资源的纺织纤维工业taint someone’s reputation玷污某人的名誉Her government never really shook off the tai...
Nitric acid forms hydrates with water.硝酸与水形成水合物.Rich vitamin E, hydrates skin after washing without getting tightness and dry.丰富维生素E, 滋润肌肤,洗后不紧绷,不干燥.This paper presents the feasibility of gas and transport using hydrates...
Few men have had such transcendental capacity to stir the heart of people.很少人有如此超群出众的打动人心的才能.He is regarded as one of the great transcendental idealists .他被认为是一位伟大的先验的观念论者。It is entirly proper to classify Kant as a trans...