VRLA battery has two kinds of technology: AGM ( absorptive glass - microfibre ) and GEL technology.VRLA电池有两类技术: AGM技术和GEL技术.Conclusion: Silica gel column chromatography and crystallization are simple and rapid Methods: T...
一种棘齿装置把线从线轴转到梭心上。A ratchet mechanism transfers the thread from spool to bobbin.操作杆进一步弯曲，线轴发出刺耳的吱吱声。The rod bent double, the reel shrieked and ratcheted.图的纵轴the vertical axis of the graph...
编码信号由碟形卫星天线接收。The coded signal is received by satellite dish aerials.卫星连接一定出了毛病。Something must have gone wrong with the satellite link.该卫星自从两年前发射以来一直没起作用。The satellite had been inactive since its launch two years ago....
They have since knocked down the shack.从那以后他们拆掉了简陋的棚屋。I moved away from the shack and picked my way among the rubble.我离开木屋，小心地走在瓦砾间。Charles Tandy , who owned Radio Shack , asked me to come and work for him.沙克广播电台的所有人查尔斯·...
The quarterly magazine is a periodical published every three months.季刊是每3个月出版一次的期刊.Not for circulation: newspaper, periodical, reference book, cyclopaedia , CD - ROM and video cassette recorder.不提供外借的资料: 报纸 、 杂志 、 工具书 、 ...
这些公共汽车将载着家属北上去探监。These buses will carry families upstate to visit relatives in prison.尽管矿井的安全状况有了很大改善，矿工的家属仍然害怕最糟的情况会发生。Though mine safety has much improved, miners' families still fear the worst.法官拒收被告家属的贿赂.The jud...