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。
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。
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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