unconditioned stimulus
柯林斯词典
1. N any stimulus evoking an unlearnt response, esp in the context of classical conditioning, in which the conditioned stimulus is followed by the unconditioned one 无条件刺激[psychol]
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1. N any stimulus evoking an unlearnt response, esp in the context of classical conditioning, in which the conditioned stimulus is followed by the unconditioned one 无条件刺激[psychol]