“vacuum tube”的概念、定义、翻译、参考文献-科学参考

单词	vacuum tube
释义	vacuum tube [`vak·yǝm ´tüb] ^ELECTRONICS An electron tube evacuated to such a degree that its electrical characteristics are essentially unaffected by the presence of residual gas or vapor.
随便看	ion-acoustic wave ion atmosphere ion backscattering ion-beam mixing ion-beam scanning ion burn ion chamber ion cloud ion column ion concentration ion counter ion crystal ion current ion cyclotron frequency ion-cyclotron-resonance mass spectrometer ion density ion detector ion emission ion engine ion exchange ion-exchange chromatography ion-exchange electrolyte cell ion exchanger ion-exchange resin ion exclusion

科学参考收录了103327条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。