但，为什么添加了压力激素，却减少了恐惧呢？

But why would adding a stress hormone actually reduce fear?

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皮质醇通常被称作压力激素，睾酮可以影响人们面临挑战时的反应状态。

Cortisol is often called the stress hormone. Testosterone can potentially influence responses to take risks.

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但是这些压力激素会导致高水平的炎症，最终使他们的免疫系统被削弱并变得脆弱。

But those hormones could produce heightened levels of inflammation, ultimately leaving their immune systems weakened and vulnerable.

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