Glasgow has broadened its appeal since taking on the mantle of European City of Culture in 1990...自从1990年荣获“欧洲文化之都”的光荣称号以来，格拉斯哥的魅力大增。This broadened my vision and knowledge.这件事使我打开了眼界, 增长了知识。Amway has enriched my life, br...
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...