Black bear cubs use trees for defense, whereas brown bears and polar bears, which regularly inhabit treeless environments, rely on aggression to protect their cubs.

黑熊幼崽用树来防御，而经常生活在没有树的环境中的棕熊和北极熊则依靠攻击性来保护它们的幼崽。

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They explore this theory with three studies, two on helping behaviours and one on aggression.

他们用三项研究探索了这个理论，其中两项关于助人行为，一项关于侵犯。

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Yet more than 40 years of research reveals that expressing anger directly toward another person or indirectly toward an object actually turns up the heat on aggression.

尽管超过四十年的研究结果表明，将怒气直接发泄到其他人身上或者间接地发泄到某一物体上，实际会起到火上浇油的后果。

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I.C.C.countries also agreed to delay any action by the court on aggression until they re-examine the issue in seven years.

VOA: special.2010.06.21

Extreme aggression trying to run the total collapse of the system feeding on the self.

通过极端的方式,改变系统崩溃。

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This is partly because I.C.C.members could not agree on how to define aggression.

VOA: special.2010.06.21

The Joneses were a crowd Dan and Tammy had hardly encountered before: professionals, entrepreneurs, highly educated people with ambition bordering on aggression.

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Administrators have cracked down on physical aggression in schools, enforcing zero tolerance policies for fighting between students.

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"Some people choose to take out their aggression on inanimate objects in this case, their monitor, keyboard or mouse, " he said.

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