noun🔗Share三极管 A thermionic valve containing an anode, a cathode, and a control grid; small changes to the charge on the grid control the flow from cathode to anode, which makes amplification possible."The old radio used a triode to amplify the weak signal from the antenna, making the music audible. "那台老式收音机使用三极管来放大来自天线的微弱信号，使音乐能够被听到。electronicsdevicetechnologymachineelectricsignalphysicsChat with AIVocabulary GamePractice Reading
