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...
It was a marvel that the floor never gave way.惊奇的是地板居然从未塌陷。She's marvel to be able to shoot with such accuracy.她的枪法那么好,真不简单.Niagara Falls is one of the greatest marvel in the world.尼亚加拉瀑布是世界大奇景之一....
非暴力和忍耐是他们的信仰的核心原则。Non-violence and patience are the central tenets of their faith.在他漫长的一生中，他对基督教信仰始终是一种摇摆不定的态度。He maintained an ambivalent attitude to the Church throughout his long life.他们强烈感受到他们的宗教信仰与政治体制不相称。They feel ...