cathode ray是什么意思 cathode ray怎么读
cathode ray的英文翻译是什么意思，词典释义与在线翻译
Noun:- a beam of electrons emitted by the cathode of an electrical discharge tube
cathode ray的用法和样例
用作名词 (n.)
- A cathode ray tube is shaped like a large bell.
阴极射线管的形状象个大铃铛。 - Cathode rays are attracted by a positive charge.
阴极射线被阳电荷所吸引。
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