Aggression is a kind of innate survival mechanism, an instinct for self preservation, that allows animals to defend themselves from threats to their existence.
攻击性是一种天生的生存机制，一种自我保护的本能，使动物能够保护自己不受生存威胁。
The researchers explained that the study demonstrated when we are in a novel environment the brain partly remains alert so that humans can defend themselves against any potential danger.
研究人员解释说，这项研究表明当我们处于新环境，大脑会保持部分警觉，这样人类就能在各种潜在的危险中保护自己。
They find it hard to defend themselves.
他们发现很难为自己辩护。
All our officers are trained to defend themselves against knife attacks.
我们所有的警察都接受过自卫训练，能够对付持刀袭击。
Finally they took up arms to defend themselves.
他们最后终于拿起武器进行自卫。
Ants defend themselves by biting or by stinging.
蚂蚁通过咬和刺来保护自己。
America's priority is to help nations defend themselves.
美国最优先考虑的是帮助各国自卫防御。
Many of the indigenous plants aggressively defend themselves.
很多本土植物为保护自己而有攻击性。
It is a fixed rule with the wise never to defend themselves with the pen.
智者不会用笔来为自己辩解，这已是永恒的法则。
But plants can defend themselves by using both physical and chemical means.
但植物也能用物理和化学方法来保护自己。
Animals use their claws or talons to catch prey, climb trees, and defend themselves.
动物使用爪子来捕获猎物，攀爬树木和自我防御。
They're often unable to deal with aggressiveness and hardly learn to defend themselves.
他们常常不会处理外界对他们的侵犯，很难学会保护自己。
At least that's the scheme some plants have developed to defend themselves from leaf eaters.
至少一些植物就采用了这个计划来保护自身免于食草动物的伤害。
Article 32 the parties shall have the right to state their cases and to defend themselves.
第三十二条当事人有权进行陈述和申辩。
The Israelis are now saying they won't take risks for peace if they can't defend themselves.
以色列人宣称，如果他们不能保卫自己的安全，他们不会冒险寻求和平。
It's hard to win these types of games, against sides who come to San Siro to defend themselves.
那些球队来到圣西罗就是为了防守，和这样的队伍交手很难取胜。
Aircraft carriers and their accompanying ships are unable to defend themselves against such a threat.
航母和随行船只无法在这样的威胁下保护自己。
Though one may be overpowered, two can defend themselves. A cord of three strands is not quickly broken.
有人攻胜孤身一人，若有二人便能敌挡他。三股合成的绳子，不易折断。
The bill would infringe upon the ability of law-abiding citizens to defend themselves and their families.
这项法案会限制守法公民自卫和保护家人的能力。
Countries should be able to defend themselves, he suggested, if an attack posed imminent danger to human lives.
切尔托夫指出，如果出现一场使人类生命危在旦夕的袭击，各国应该有能力保护自己国家的人民。
They must also hire lawyers to defend themselves against attacks by other lawyers on a playing field built by lawyers.
它们还要在受到其他律师攻击时聘请律师为自己辩护，而这唇枪舌战的比赛场地依然是律师们自己搭建的。
All pangolins can roll themselves into a ball to defend themselves. The cutting action of their scales protects them too.
所有穿山甲都能够把身体卷成球状来保护自己，锋利的鳞甲也是保护它们的工具。
We must expect these teams which come to San Siro and defend themselves, not allowing Milan to find Spaces to go forward.
这些来到圣西罗的客队抱着死守的态度，不让米兰找到更多进攻的空间。
But employers can successfully defend themselves if they can prove there is a strong business case for what they are doing.
但雇主若能证明该做法有很强的商业理由，就能为自己成功辩护。
"Though one may be overpowered, two can defend themselves. A cord of three strands is not quickly broken" (Ecclesiastes 4:12 NIV).
《传道书》4：12有人攻胜孤身一人，若有二人便能敌挡他；三股合成的绳子不容易折断。
Every plant, Ames said, is full of 100 or more chemicals, including "natural pesticides," which the plants make to defend themselves against predators.
Ames说，每一种植物，都富含100种以上的化学物质，包括“天然农药”，这是植物为了保护自己免于被取食者侵害而产生的。
They've been around 300 million years, so they've had plenty of time to learn how to defend themselves against disease-causing microbes in the environment.
它们已存在约3亿年，因此它们有足够的时间来学习如何保护自己免受环境中致病微生物的伤害。
They've been around 300 million years, so they've had plenty of time to learn how to defend themselves against disease-causing microbes in the environment.
它们已存在约3亿年，因此它们有足够的时间来学习如何保护自己免受环境中致病微生物的伤害。
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