R " is a replaceable function , e . g . acetoxy, methoxy, their acyloxy and alkoxy homologs or halo.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.The results show that zinc acetate - stearic acyloxy has thermal stability and synerg...
翻下来缝外侧的边。Turn under and hem the outer edges.火车轮外侧的金属轮箱便压在这根铁轨上.Metal shoes outside the wheels of the train then press downwards on this rail.细粒粘土可以沉积在天然堤外侧的隐蔽湾中.Fine - grained clay may settle out in the sheltered bays on...
她开始加快步子，但他加大了步幅跟着她。She began to walk faster, but he lengthened his stride to keep up with her.四肢长度, 力量和跑步技术可以影响步幅.Limb length, strength and running technique can affect stride length.前步幅带动身体前进, 而不是向上, 这样不容易疲劳.The propels...
The agendas for the next two meetings have yet to be worked out.下两次会议的议程尚需制定.These will be the major agendas of the summit talks.这些会是峰会的主要议题.Mangers should pay more attention to the agendas of meetings.经理应该更加关注会议的日程安排.Ma...