1. 猛攻;强攻
    An assault by an army is a strong attack made on an area held by the enemy.

    e.g. The rebels are poised for a new assault on the government garrisons...
           叛军准备好要对政府驻军发起新一轮的猛攻。
    e.g. Most US soldiers welcomed the ground assault when the order was finally given.
           当命令最终下达的时候，大多数美军士兵都愿意发动地面进攻。

2. （武器）用于战争的，军用的
    Assault weapons such as rifles are intended for soldiers to use in battle rather than for purposes such as hunting.

    e.g. ...a high-powered assault rifle.
           大火力军用步枪

3. 人身攻击；殴打；（身体）侵犯
    An assault on a person is a physical attack on them.

    e.g. The attack is one of a series of savage sexual assaults on women in the university area...
           这次袭击是在大学校园内发生的一系列针对女性的野蛮性侵犯事件中的一起。
    e.g. At the police station, I was charged with assault.
           在警察局，我被指控殴打他人。

4. 袭击；殴打
    To assault someone means to physically attack them.

    e.g. The gang assaulted him with iron bars...
           这伙人用铁棍殴打他。
    e.g. She may have been sexually assaulted by her killer.
           她可能遭到过凶手的性侵犯。

5. 严厉抨击;强烈批评
    An assault on someone's beliefs is a strong criticism of them.

    e.g. He leveled a verbal assault against his Democratic opponents.
           他猛烈抨击其民主党对手。