释义
n.
〈非正式，主北美〉 （无药效但以医百病为卖点的）蛇油，万灵药
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some kelp products are snake oil, but the good ones promote plant growth 有些海藻产品是并无药效的万灵药，但有些品质好的确能促进植物生长
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figurative 〈喻〉the president's foreign policy is snake oil. 总统的外交政策是空话、废话。