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N-COUNT A placebo is a substance with no chemical effects that a doctor gives to a patient instead of a drug. Placebos are used when testing new drugs or sometimes when a patient has imagined their illness. (无药用效果的)安慰剂
placebo effect n. 安慰剂效果
Diplomatic placeboes reduce the perceived need and popular support for more effective, albeit more difficult, alternatives.
CENTERFORSECURITYPOLICY: Tyranny's enabler
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