an improvement in the health of a person who has been given a substance that contains no active ingredients. The positive response is attributable only to the person's belief that the substance will produce a beneficial result
| 单词 | placebo effect |
| 释义 | placebo effectnounan improvement in the health of a person who has been given a substance that contains no active ingredients. The positive response is attributable only to the person's belief that the substance will produce a beneficial result |
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