electron tube英 [ɪˈlektrɒn tjuːb]美 [ɪˈlektrɑːn tuːb]电子管;真空管电力英英释义nounelectronic device consisting of a system of electrodes arranged in an evacuated glass or metal envelopeSynonym:tubevacuum tubethermionic vacuum tubethermionic tubethermionic valve双语例句