Not for nothing was the plane called "The widow-maker"这种飞机被称作“寡妇机”是事出有因的。She's a widow now.她现在是寡妇。The widow is in possession of a large fortune.那个寡妇占有大笔财产....
黑药和镁的混合物具有离析的倾向.Mixture of black powder and magnesium have a tendency to segregate.这能离析为旋光异构体 吗 ?Can it be resolved into optical isomers?看物质能否由于沸腾和冻结而离析为组成该物质的元素.See whether the material can be separated into its element...