发射极的英文：
emitter
emitter region

参考例句：

The base region is always very much narrower than the emitter or collector regions
基极总是比发射极和集电极薄得多。

The region in a transistor between the emitter and the collector.
晶体管中发射极和集电极之间的区域。

We have been considering the transistor with a current fed into the emitter
我们所研究的晶体管都是把电流馈入发射极。

A transistor has three electrodes, the emitter, the base and the collector.
晶体管有三个电极，即发射极、基极和集电集。

emitter是什么意思：
n. 发射器，发射体

The region in a transistor between the emitter and the collector.
晶体管中发射极和集电极之间的区域。

The concepts of radiant emittance and of irradiance are complementary.
辐射的发射强度和辐照度是两个互补的概念。

emitters on trickle system can be blocked by precipitate
灌溉系统中的发射器会被沉积物所堵塞。

We have been considering the transistor with a current fed into the emitter
我们所研究的晶体管都是把电流馈入发射极。

Emittance and irradiance are meaningful measurements of flux at a specific surface
发射强度和辐照强度只有对一定表面上通量的量度才是有意义的。

region是什么意思：
n.地区，行政区，领域，范围

regional exchange
美国在纽约以外地区的证券交易所

He is an authority in the region of chemistry.
他是化学界的权威。

This region is remarkable for its scenery.
这个地区享有风景独特的盛名。

region of high barometric pressure
高气压区

regional conference on the private sector
私营部门问题区域会议