Branch of physical science dealing with the action of electrons in vacuums, gases, and semiconductors and with the construction and use of devices in which the action of electrons is applied.

电子学(研究电子在真空管、气体、半导体的活动及电子应用设备的装置和使用)。

The branch of industry that makes such products as radio, television, and recording apparatus.

电子工业。