不仅具有Anti-spam的功能，还有病毒扫描（Anti-Virus）、攻击侦测（Attack Detection）、入侵反制（Intrusion Defense）和系统保护（Overall System Protection）的功能，对于您刚才提到的那些恶意行为是可以防止的。
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更秘密的太空研究则设想，比方说可以发射小卫星充当“守护天使”，来侦测针对大卫星的可能攻击。
More esoteric space research has ideas such as sending small satellites to act as “guardian angels”, detecting possible attacks against the big birds.
训练免疫系统识别肿瘤新发或复发初始信号后，它们便能在最早期开始攻击恶性肿瘤，这个时间远早于最好的扫描技术能侦测到这些肿瘤的时间点。
An immune system trained to recognize the first signs of new or recurrent growth can begin to attack malignancies far earlier than the best scans can detect them.
我们很自然的就会想到攻击者以后会制作出更难侦测到的注入了恶意软件的幻灯片。
It's not far-fetched to imagine that in the future attackers could create even harder-to-detect malware-infused slideshows.
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