closed separation of fingers

例句：

1. 1.The door is closed, please knock before entering.
   门已关，请敲门再进入。
2. 2. The factory is closed for maintenance.
   工厂因维修而关闭。
3. 3. The room was closed off from the rest of the house.
   房间被从房子的其他部分隔离开来。