Objective To establish solvent desorption gas chromatographic method for determination of Diisobutyl ketone in workplace.目的建立工作场所空气中二异丁基(甲)酮的溶剂解吸气相色谱测定方法.The diisobutyl dicarboxylate was prepared by using acid and isobut...
Such high price, make a grandfather astonied, pulling grandchildren to want.如此高价, 使爷爷大吃一惊, 拉着孙子要走.Doctor Mao let astonied, ask her: " What meaning is this? "毛医生听了大吃一惊, 问她: “ 这是什么意思? ”This ( amount ) make me astonied.这 ( ...
He has remained largely aloof from the hurly - burly of parliamentary politics.他基本上一直对喧嚣的议会政治漠不关心.This is such a hurly - burly world where life is solitary.世事喧嚣,人生寂寞....
nocturnal predators夜间活动的食肉动物The birds cannot afford to relax their vigilance against predators.鸟儿不敢放松对捕食者的警戒。Their natural predators have been killed off.它们的天敌被全部杀死。Predators that stalk the deepest woods and the darkest ...