“超外差接收”的概念、定义、翻译、参考文献-科学参考

单词	超外差接收
释义	超外差接收 Encyclopedia 工学【通信基础理论】释 superheterodyne receiving超外差接收将接收到的已调高频信号（即调制后的高频信号）送到混频器，然后与本地振荡器所产生的高频信号进行混频，在其输出端得到的波形包络形状与输入高频信号相同，但频率却降为某一固定中间频率（简称中频）的信号接收技术。
随便看	elemental form elemental fractionation elemental mapping elemental network elemental semiconductor elemental snalysis of pharmaceuticals elemental speciation analysis elemental speciation analysis for geochemical samples elemental spectroscopy logging elemental term element analysis of coal element antenna Elementa Physiologiae Corporis Humani elementarily equivalence elementarily equivalent elementarily equivalent models elementarily equivalent structures elementarily substructure elementarity elementar reation elementary elementary Abelian group elementary algebra elementary alternating expression Elementary and Secondary Education Act (U.S.A.)

科学参考收录了854744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。