aggression (= angry and threatening behaviour) that happens in order to achieve a particular aim, for example to steal something, rather than as a reaction to something that someone else does

Proactive aggression is aggression that is purposeful and goal directed. 主动攻击是有目的和目标导向的攻击。

Some children may exhibit unregulated behaviours, for example proactive aggression. 有些孩子可能表现出不受监管的行为，例如主动攻击。