heated cathode的用法和樣例：
例句
- A microwave tube in which electrons generated from a heated cathode are affected by magnetic and electric fields in such a way as to produce microwave radiation used in radar and in microwave ovens.
磁控管一種微波管，它里面的發(fā)熱陰極發(fā)出的電子受到磁場(chǎng)和電場(chǎng)的影響，從而產(chǎn)生能用于雷達和微波爐微波輻射
