例句與造句

1. Plc or relay control with optional operation of manual and semi - auto
   有電腦、繼電器兩種控制方式，設有手動、半自動兩種操作方式。
2. All control circuits are integrated ( including power mos ) in the ic except the output low - pass filter , two optional operation modes : pwm and pfm are available
   該ic集成了除輸出低通濾波器的所有控制電路(包括功率mos ) ,提供pwm和pfm兩種模式供選擇。
3. It's difficult to find optional operation in a sentence. 用optional operation造句挺難的