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有一句谚语说:“物以稀为贵.”稀有、罕见的商品的确能左右价格.银耳原来比黑木耳贵,人工种植成功以后,银耳的价格反而比黑木耳便宜了.
There is an old adage saying: “Rare things.” Rare, rare commodities can really affect the price of white fungus is more expensive than black fungus, after the successful planting, the price of white fungus cheaper than black fungus.