相反，对于那些认为成绩下降是一种永久的、无法挽回的状态的学生来说，成绩的下降只会预兆着他们应激激素的上升。

Instead, declining grades only predicted worse stress hormones among students who believed that worsening grades were a permanent and hopeless state of affairs.

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头痛得重视，因为它可能是一种严重疾病的第一个预兆，如果及早发现的话，这种严重疾病可能会得到控制。

A headache is important because it can be the first warning of a serious condition that could probably be controlled if discovered early.

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金价的下降也可能是另外一种方式的预兆。

Gold's fall could be an omen in another way, too.

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