在人们无法找出原因和结果的关系的时候，他们便会寻求目的论的解释。

Where people did not know how to seek the relation of cause and effect, they looked for a teleological interpretation.

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因果关系是一件事(原因)和第二件事(结果)之间的关联，其中第二件事被认为是由于第一件事所产生的结果。

Causality is the relationship between an event (the cause) and a second event (the effect), where the second event is understood as a consequence of the first.

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研究者们警告说，对于乐观和健康结果之间的关系，他们的研究结果仅仅只表明了一种相关性，而不是“原因和结果”的关系。

The researchers caution that their findings only show a link, not a cause-and-effect relationship, between optimism and health outcomes.

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