1 sentence

1. 这把万能钥匙可以打开这层楼所有的门。

   zhè bǎ wàn​néng yào​shi kě​yǐ dǎ​kāi zhè céng lóu suǒ​yǒu de mén.

   This master key can open all the doors on this floor.

   Source: Dong Chinese Dictionary