点阴极点状阴极point: n. 1.尖头,尖端;尖头器具;〔美国〕笔尖;接种针,雕 ...cathode: n. 【电学】阴极,负极。 emitting point cathode: 点阴极activated cathode: 活化阴板; 活性阴极; 激活阴极activity of cathode: 阴极放射性[活力; 阴极活度阴极活性; 阴极效率下载手机词典可随时随地查词查翻译