H. U. and yolk index were significantly positively correlated with freshness.

哈夫单位（H.U）和蛋黄指数与蛋的新鲜度呈显著的正相关；

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H. U. and yolk index were significantly positively correlated with freshness.

哈夫单位（H.U）和蛋黄指数与蛋的新鲜度呈显著的正相关；

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