基本解释[經濟學]熱離子真空琯同根派生 thermionic vacuum tube相关词词组短语短語vacuum thermionic tube detector 真空熱離子琯檢波器vacuum m thermionic tube detector 真空熱離子琯檢波器thermionic vacuum tube更多词组专业释义經濟學熱離子真空琯