小区保安介绍说，地下室不大，而且只有一个供出入的门，关上门就相当于是一个密闭的空间。大家来到地下室的门口，发现带有血迹的钥匙还插在门上。
xiǎoqū bǎoān jièshào shuō ，dìxiàshì bùdà ，érqiě zhǐyǒu yī gè gōng chūrù de mén ，guān shàng mén jiù xiāngdāngyú shì yī gè mìbì de kōngjiān 。dàjiā láidào dìxiàshì de ménkǒu ，fāxiàn dàiyǒu xuèjì de yàoshi hái chā zài mén shàng 。
The compound guards explained that the basement was small. There was only a single door, and when it was closed the room was completely sealed shut. When the party arrived at the basement’s entrance, they discovered that a bloody key was still lodged in the door.