攻击开始时刻

例句：

1. 1. The enemy attacked our troops with heavy artillery.
   敌人用重炮向我们的部队发起了攻击。
2. 2.The police were called to the scene of the attack.
   警察被召到袭击现场。
3. 3. The terrorists launched a coordinated attack on the city's defenses.
   恐怖分子对城市的防御系统发动了协调一致的攻击。