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”。

youdao

However, if you are in a dangerous situation, what will you do, fight or flight?

然而，如果在你处于危险的情况下，你会怎么做，对抗还是逃跑？

youdao

When threat is perceived, the RAS automatically selects related sensory input and directs it to the lower brain where the involuntary response is not to think, but to react-fight, flight, or freeze.

当威胁被感知到以后，RAS自动选择相关的感觉输入，并将其送进较低的脑(也叫“爬虫的脑”)，那里的非自愿响应不是去思考，而是作出反应-战斗，逃跑，或僵硬地呆立不动。

youdao

Researchers believe the increase in heart rate might demonstrate what they call the fight or flight response.

VOA: special.2009.08.18

So my consciousness narrows and constricts, and I'm in the "fight or flight" mode.

我的意识变得狭窄，收紧，进入“对抗或逃跑“模式。

哈佛公开课 - 幸福课课程节选

When you work based on fear, you create adrenaline from the fight or flight response.

FORBES: The Hidden Work-Life Balance Crisis Among Entrepreneurs

But the AbioCor lacks a response to "fight or flight, " a hormonal mechanism triggered by the brain.

FORBES: Lonely Heart

Fear and greed, which originate from two of our most primal instincts, fight or flight, are the culprits.

FORBES: Think Twice Before Jumping On Facebook's IPO Bandwagon