以二羧酸和异丁醇为原料,用硫酸作催化剂,合成二羧酸二异丁酯.The diisobutyl dicarboxylate was prepared by using acid and isobutanol as material and acid as catalyst.以冰醋酸、异丁醇为原料,硫酸高铈为催化剂合成乙酸异丁酯.A method for synthesis of isobutyl acetate based on ceric ...
他缓过劲儿来，骑马逃离了追赶他的人。Finding a second wind, he rode away from his pursuers.别人给娜奥米一匹小型马并教会她如何侧骑马。Naomi was given a pony and taught to ride side-saddle.你会骑马吗？Can you ride?...
Alma asked Ennis to use rubbers because she dreaded another pregnancy.阿尔玛在杂货店当店员.Organic rubbers develop a resinous surface crust through weathering.有机橡胶经过风蚀后,逐呈现出树脂状的外表.The mechanism of tackification of rubbers by resin...