在半导体收音机中晶体管代替了真空管.In semiconductor receivers transistors take the place of vacuum tubes.与老式真空管相比,晶体管具有许多优点.Transistors have many advantages over the old - fashioned vacuumtube valves.真空管或显影管都未破碎.No vacuum or picture tube...
他刮掉糊墙纸,看到了里面的镶板.He scraped away the wallpaper and found panelling underneath.剥掉那张难看的糊墙纸,用灰泥把缝隙填好.Strip off that awful wallpaper and fill the cracks with plaster.家具给糊墙纸衬得不好看了.The wallpaper kills the furniture....