frequency shift system的用法和樣例：
例句
- High-speed in-amps may be used in many video and cable RF systems to amplify or process high frequency signals.
高速儀表放大器可以用于許多視頻和閉路射頻系統的放大或者處理高頻信號。 - We have designed and made a new HTS mixing system mounted on the cryocooler.Some measures have been taken to decrease the system noise.
我們設計了與小型制冷機配套的高溫超導混頻系統，采取一些抑制系統噪聲的措施。
