Servosystem
[计] 伺服系统
🗣️ 情景例句
Telephone Mrs. Zaskey at the advertising agency.
打电话给广告代理Zaskey夫人。
I'm sorry, but I think she's stepped out.
对不起，我想她出去了。
This depends on the precise radio frequency of the 21-cm wavelength, or 1420 megacycles per second.
这种通讯联系要靠21厘米波段，即每秒1420兆周的精确无线电频率。