Backsiphonage
反虹吸
🗣️ 情景例句
My name is Lu Wei. I am beside Beijing Hotel on Changan Street.
我叫陆伟，在长安街北京饭店旁边。
A great ship asks deep waters.
大船要走深水，蛟龙要在海中游。
No, thank you. Thanks for all your help.
不必了，谢谢。谢谢你帮了我大忙。