In a purely biological sense, fear begins with the body's system for reacting to things that can harm us—the so-called fight-or-flight response.

从纯粹的生物学意义上讲，恐惧始于身体系统对可能会伤害我们的事情的反应，也就是所谓的“战或逃反应”。

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"Gagarin was aware of the fears concerning zero gravity, and he also knew about all failed launches preceding his flight, " but he never showed any fear or doubt, Ivanovsky said.

“Gagarin清楚对于零重力的担忧，他还知道飞行之前所有失败的发射。” 但是他没有表现出害怕和疑虑，Ivanovsky说到。

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The standard flight rule for all aircraft is to avoid any thunderstorm activity, and yet Frank shows no fear by staying on course.

所有飞机的标准飞行准则是要避免雷暴活动，而Frank还是照原路前进，没有丝毫恐惧。

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Residents living under the flight path fear a second runway would increase noise levels and cause air quality to deteriorate.

BBC: Gatwick Airport

For investors, Pursche recommends being underweight on exposure to international and emerging markets to avoid the potential consequences of fear-induced capital flight.

FORBES: 5 Market Predictions for 2012

We feel the fear, and instantly take flight.

FORBES: Fear is Good!