想要围攻得手，攻击需要在俄国主力到达前以最快速度结束。

For the siege to be successful it needed to be over quickly before the main Russian army arrived.

youdao

这些防御武器被设计用来对抗大型目标的威胁，如主力舰的攻击，但它们过于笨重，无法咬住像同盟星际战斗机那样快速移动的飞船。

These defenses were designed against large scale threats, such as capital ship attacks, and were too ponderous to track fast-moving vessels such as Alliance starfighters.

youdao

敌人的主力受到攻击。

The enemy's main force came under attack.

youdao