Feeling the stress of the flight, he declined.

感到飞行的压力，他拒绝了。

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Bipolar disorders also heighten the activity of the sympathetic nervous system, which sets off the fight-or-flight response to stress.

双相情感障碍也加强了交感神经系统的活动性，它对压力做出战斗-逃跑的反应。

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Extreme stress can actually cause the higher regions of the brain to shut down, shunting mental energy into areas devoted to aiding the fight-or-flight instinct.

极端的压力实际上会导致大脑高级区域停止运作，使精神能量分流到专注于帮助逃跑或战斗的本能的区域。

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While it might sound like this poor mom has what it takes to be the next Andrea Yates, it's important to understand that she's really just adjusting to the "fight or flight" stress hormones that for any new mom or mom-to-be are innate and incredibly powerful, Brizendine said.

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Beta blockers work by reducing activity in the sympathetic nervous system, which is one of the two major branches of the body's stress (or fight-and-flight) system.

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