dead hours

• 半夜三更,夜深人静

dead hours的用法和样例：

例句

1. The soldiers moved against the enemy in the dead of the night.
   夜深人静之时，士兵们向敌人发起了进攻。
2. We thought it was too good, though to be honest, there are clandestine whispers echoing through our offices in the dead of night to change it back.
   我们认为它太强大了，实际上，夜深人静的时候我们也常常考虑是不是要改回去。