We know that animals use pheromones to alert their peers of things like mating, food sources, and danger, and researchers hypothesize that pheromones can play a role in human behavior as well.

动物靠信息素来提醒同类诸如求偶、食物来源、危险等信息。 研究人员假设信息素在人类行为中也起了一定作用。

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He also was concerned about "moral hazard," the danger that too generous a price would encourage future risky behavior.

他同样担心“信用危机”，由于过于慷慨的价格将来可能引发一些危险举动。

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The danger, of course, is that such repeated exits run the risk of discovery, so the safe location and exit route become known, and the behavior is questioned.

当然，危险的是此类再三逃跑有被发现的风险，这样安全地点和逃离路线变得众所周知，这种行为就会被人质疑。

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Fenton was so concerned about Holmes' behavior that she mentioned it to her colleagues in early June, saying he could potentially be a danger to others, CNN affiliate KMGH reported, citing sources with knowledge of the investigation.

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