“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	air pollution auto-monitoring system Air Pollution Control air pollution control and health protection air pollution control chemistry Air Pollution Control Law air pollution control of mobile sources air pollution in China air pollution map air pollution monitoring air pollution prevention and control law air pollution prevention and control of collection and distribution system for the ports air pollution prevention and control of two pollution control zones airport airport allocation planning airport automatic people mover airport aviation meteorological facility airport cargo area airport cargo warehouse airport clearance zone airport dedicated road airport depot airport economy airport electromagnetic environment airport electromagnetic environment protection airport engineering

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。