vacuum tube英 [ˈvækjuːm tjuːb]美 [ˈvækjuːm tuːb]n. 真空管化学英英释义nounelectronic device consisting of a system of electrodes arranged in an evacuated glass or metal envelopeSynonym:tubethermionic vacuum tubethermionic tubeelectron tubethermionic valve双语例句
