当地警察称，沙滩游客无须担心受到鲨鱼的威胁，因为它们从不会主动攻击人类。
Local police officer said beachgoers should not feel threatened by sharks because the fish never attack human beings on their own initiative.
它们并不倾向主动攻击人类，但有很强的防御意识，一旦被激怒就会发动攻击。
They do not actively seek out humanprey, but are very defensive and will attack when provoked.
新数据显示说，乌贼“不会主动攻击，也不是可怕的食肉动物，它只是一种生活节奏很慢的动物”。
The new data show "not an active or a fearsome predator, but one that has a really slow pace of life."
美国的食品以及药物管理委员会在去年4月份通过了对Provenge的审核，这个癌症疫苗强化了身体免疫系统，使免疫系统会主动攻击肿瘤。
The Food and Drug Administration last April finally approved Provenge, a prostate cancer vaccine that stimulates the body's own immune system to attack tumors.
身份认证与访问控制是信息系统防御主动攻击的主要安全机制。
Identity authentication and access control are the major security mechanisms to defend active attack.
和BD相比，ABD不仅能抵抗被动攻击还能抵抗主动攻击。
Compared with BD, ABD can resist not only passive attack but also active attack.
人的野心永远不会消停。起初， 人们是为了保护自己免受别人的攻击，后来则是主动攻击别人。
Men rise from one ambition to another. first they seek to secure themselves against attack, and then they attack others.
抗选择密文攻击公钥密码体制是安全性很高的密码体制，它是设计抗主动攻击的协议非常有用的工具。
The public key cryptosystem secure against chosen ciphertext attacks is a very strong secure cryptosystem and is a useful primitive for designing protocols that resisting active adversary.
过去一年，他不是简单地试图绕过传统媒体机构，而是主动攻击它们，例如，指责美国有线电视新闻网（CNN）报道“虚假新闻”。
And he has not simply tried to bypass traditional media outlets over the past year but actively attacked them, accusing CNN of reporting "fake news", for example.
过去一年，他不是简单地试图绕过传统媒体机构，而是主动攻击它们，例如，指责美国有线电视新闻网（CNN）报道“虚假新闻”。
And he has not simply tried to bypass traditional media outlets over the past year but actively attacked them, accusing CNN of reporting "fake news", for example.
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