Cannon found that pain, fear and rage occurred in circumstances which affected the supply of adrenin, and that an artificial injection of adrenin could, for example, produce all the symptoms of fear.

坎农发现，疼痛、恐惧和愤怒发生在影响肾上腺素供应的环境中，例如，人工注射肾上腺素可能会产生恐惧的所有症状。

The most interesting part of Cannon's book consists in the investigation of the effects produced by secretion of adrenin. Adrenin is a substance secreted into the blood by the adrenal glands.

Cannon 书中最有趣的部分在于对肾上腺素分泌产生的影响的调查。肾上腺素是一种由肾上腺分泌到血液中的物质。

He studied the effects of adrenin on various parts of the body; he found that it causes the pupils to dilate, hairs to stand erect, blood vessels to be constricted, and so on.

他研究了肾上腺素对身体各个部位的影响；他发现它会导致瞳孔放大、毛发竖立、血管收缩等。