The electrode attached to this region.
晶体管内的电子附着在晶体管这个区域的电子
An electrode used in certain electron tubes to provide secondary emission.
中间极，二次发射电极一种用于一定电子管作第二次发射电极
A faint glow enveloping the high-field electrode in a corona discharge, often accompanied by streamers directed toward the low-field electrode.
电晕在电晕放电中在高压电极出现的一种微弱光辉，常伴随有朝向低压电极的电流
