bottom side door

例句：

1. 1.This room has a bottom side door that leads to the balcony.
   这间房间有一个底部的侧门，通往阳台。
2. 2.The security guard at the bottom side door was very helpful.
   楼下侧门的保安非常乐于助人。
3. 3. When I arrived at the bottom side door, I saw a group of people waiting for me.
   当我到达底部侧门时，我看到一群人在等我。