伏击

例句：

1. 1. The enemy forceswere caught in a surprise attack by ourtroops.
   敌军部队被我军的突袭所包围。
2. 2. The spy was caught in a trapset by the police.
   这名间谍被警方设下的陷阱捕获。
3. 3. The army launched asurprise attack on the enemy's stronghold.
   军队对敌人的要塞发起了突袭。