例句與造句

1. Delay line oscillator is composed of broadband amprifer adjustable attenuator and saw sensor device . after output signal of delay line oscillator is smoothed , it mixes with 109mhz local oscillation signal . its differential frequency signal is smoothed by low - pass filter trimmed by shaping circuit and processed by digital processing circuit
   延遲線振蕩器由寬帶放大器、可調(diào)衰減器和聲表面波質(zhì)量傳感器件構(gòu)成。延遲線振蕩器輸出信號經(jīng)濾波后與109mhz的本機(jī)晶體振蕩器輸出信號相混頻，通過低通濾波取其差頻，并經(jīng)整形后由數(shù)字信號處理電路處理。
2. It's difficult to find adjustable attenuator in a sentence. 用adjustable attenuator造句挺難的