Pavlov found that dogs would drool as soon as they heard the signal for feeding.
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history
He won the 1904 Nobel Prize in Physiology or Medicine for his work on digestion, the first Russian to win a Nobel. The 条件反射, conditioned reflex, grew out of that work, when his dogs began to salivate at signs that food was coming.
usage
巴甫洛夫的狗, 'Pavlov's dog', is used as in English for someone who reacts automatically to a cue.
