Backsiphonage
反虹吸
🗣️ 情景例句
Yes, sir.
是的 ，先生。
What''s the fare to New York, Economy Class?
去纽约的经济舱机票多少钱？
I tried to wake up my wife by ringing the doorbell,
我按响了门铃，试图唤醒我的妻子，