These soothing feelings most likely result from the release of endorphins, brain chemicals that relieve pain and can produce euphoria.

这些舒缓的感受最可能是释放内啡肽的结果，它是大脑化学物质可以产生兴奋和缓解疼痛。

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While this is rarely dangerous, it can cause pain and produce scar tissue that may make it tough to get pregnant.

这是相当危险的，这种情况可引起疼痛以及疤痕组织产生，从而导致怀孕困难。

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People who produce lower amounts of the brain molecule neuropeptide Y (NPY) had "measurably stronger brain responses to negative stimuli and psychological responses to physical pain," the study said.

可检查结果显示，易产生能调节食欲和压力的少量脑分子神经肽Y的人，大脑对消极刺激的反应和身体对生理疼痛的反应都比较强烈。

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Heat exhaustion may also produce a feeling of sickness, a fast heartbeat,breathing problems and pain in the head,chest or stomach.

VOA: special.2010.07.27

These are big companies, and those companies can produce concentrated pain.

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If drug developers could better target their inhibitors farther down the prostaglandin chain, they might produce powerful drugs that could fight pain and avoid unknown, possibly fatal, side effects.

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Pain is notoriously responsive to placebo effect and some researchers believe surgery and other complex interventions may produce may produce the biggest placebo improvement of all.

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