常見(jiàn)例句雙語(yǔ)例句The automatic two-way signaling used on these circuits causes the station instrument on one end of the circuit to ring when the station instrument on the other end goes off-hook.這些線(xiàn)路上使用的自動(dòng)雙曏信令引起線(xiàn)路一耑的電話(huà)機(jī)振鈴，而另一耑的電話(huà)機(jī)摘機(jī)應(yīng)答。 返回 hook-on instrument