showing anger and a willingness to attack other people

The stereotype is that men tend to be more aggressive than women.

If I criticize him, he gets aggressive and starts shouting. 如果我批评他，他就会寻衅大吵大闹。

Aggressive behaviour will not be tolerated in the classroom.

determined to win or succeed and using forceful action to do this

an aggressive election campaign 声势浩大的竞选活动

aggressive marketing tactics 雄心勃勃的营销策略

Both players won their first-round matches in aggressive style. 两名选手都以敢打敢拼、志在必得的打法赢得了第一轮比赛。

An aggressive condition is one that is serious and quickly spreads in the body or gets worse.

The more aggressive the cancer, the further and faster it spreads. 癌症越呈恶性，其发展就越广越快。

Aggressive treatment is strong treatment that could itself cause harm, used when someone has a serious condition.

Brain cancer requires aggressive treatment such as surgery. 脑部肿瘤需要采用积极治疗手段，比如手术。