在乐观与成功之间似乎有着某种自然的因果关系。
There seems to be a natural cause-and-effect relationship between optimism and success.
当一个人变得更加成熟，他对超自然力量和因果关系的概念可能会改变。
As a person becomes more sophisticated, his conceptions of supernatural forces and causal relationships may change.
作为自然的一部分，人类的行为是由因果关系所决定的。
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