hellbox

例句：

1. 1. The box was sealed with a heavy lock, making it impossible to open without breaking the lock.
   这个箱子被一个沉重的锁密封着，没有钥匙是无法打开的。
2. 2. He kept the box locked in his room and refused to let anyone inside.
   他把箱子锁在房间里，拒绝让任何人进入。
3. 3. The box contained valuable documents that were stolen from an antique shop.
   箱子里装有从古董店偷来的珍贵文件。