closure of bridge structure

例句：

1. 1. The dooris now closed and locked.
   门现在关着并且锁上了。
2. 2. The factory has beenclosed for repairs.
   工厂因维修而关闭。
3. 3.The window is securely closed with alatch.
   窗户用一个锁扣安全地关闭了。