1. Warships will accompany the convoy.
    军舰将护送船队.

2. The convoy was attacked by submarines.
    护航队遭到潜水艇的袭击。

3. The Karen had been sailing in a convoy to Russia when she was torpedoed by an enemy submarine.
    卡伦号是护送船只到俄国去的，途中遇到敌人潜水艇的鱼雷袭击。

4. The Karen had been sailing in a convoy to Russia when she was torpedoed by an enemy submarine.
    "卡伦"号当年在为其他船只护航驶往俄国的途中突然遭到敌方潜水艇鱼雷的袭击。