Fortunately, such a scenario is likely to remain science fiction. But smart systems might be vulnerable to malfunctioning or attacks by hackers.

幸运的是，这一幕或许仍然只是科幻小说中的情节，不过智能系统的确很容易瘫痪或是被黑客侵袭。

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Experts started investigating the cause of the decline and quickly realized that there were two possible explanations: environmental pollution or attacks by predators.

专家开始研究海獭数量下降的原因，并且很快发现了两个可能的原因，分别是环境污染和天敌捕食。

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President Obama says the attacks show that extremists have no respect for African lives or efforts for a better future.

VOA: special.2010.07.17

He believes that a virgin like the Lady is secure or safe from the violent attacks imagined by his younger brother.

他认为像那位女士那样的处女，在他弟弟想象的,暴力袭击中是很安全的。

耶鲁公开课 - 弥尔顿课程节选

The report says that in two thousand eight, two hundred sixty humanitarian aid workers were killed,kidnapped or seriously injured in violent attacks.

VOA: special.2010.08.16

"What we will not allow is conducting personal attacks against individuals, or attacks against any groups or minorities, " he added.

BBC: Jordan blocks 'unlicensed' national news websites

In 2002, China and Russia proposed a treaty banning the deployment of weapons in space or attacks against space-based objects.

ECONOMIST: China admits shooting down a satellite

If you have long panic attacks, or attacks that come in prolonged volleys, these medications work quickly enough that they can interrupt things in mid-attack.

CNN: How can I control my panic attacks?