卤素也具有吸收紫外线和分解快这两种特性.Halogens also have the necessary absorption in the ultraviolet and rapid dissociation.强烈的胞内杀菌作用可以通过骨髓过氧化物酶 - 过氧化氢 - 卤素杀菌系统发挥威力.Potent intracellular bactericidal action may be exerted through the myelo...
In semiconductor receivers transistors take the place of vacuum tubes.在半导体收音机中晶体管代替了真空管.We often turn to this handbook for information on transistors.我们常从这本手册查阅有关晶体管的资料.The transformer isolates the transistors with regar...