短語(yǔ)詞組短語(yǔ)Switching -on Pressure 接通壓力switching -on time constant 上升時(shí)間常數(shù)switching system on board 星上交換系統(tǒng)Switching lights on and off 開關(guān)電燈delayed -switching-on 通電延時(shí) 返回 switching on