导弹从那架运输机的底部飞了出来。The missiles emerge from the underbelly of the transport plane.她躺在楼梯底部，痛得呜咽着。She lay at the bottom of the stairs, whimpering in pain.底部的数字就是推荐的摄氏水温。The number at the bottom is the recommended water temper...
R ” 是取化基,如乙氧基 、 甲氧基及它们的环氧和烷氧同系物或卤基.R " is a replaceable function , e . g . acetoxy, methoxy, their acyloxy and alkoxy homologs or halo.蒸馏得质量分数高于98%的邻乙氧基苯甲酸,收率为92%.Distillation gave o ethoxybenzoic acid with 98 % of the p...