const origSet = srcObjDesc.set;
对餐饮经营者而言，首先要做到“提质稳味”：提升产品质量、稳定口味，这是基础。难吃会引发消费者的生理性抗拒，能吃只是生存底线，好吃是基础标准，美味才能建立心智。在此基础上，还要做到三个聚焦：聚焦用户、聚焦产品、聚焦场景，才能精准发力、构建顾客心智。
。快连下载-Letsvpn下载对此有专业解读
* 时间复杂度：O(n log n)（主要来自排序），空间复杂度：O(n)
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Perhaps it’s the biggest question science has left to answer, how did life begin? Now, molecular biologists in Cambridge university have discovered tiny molecules of RNA which they say might provide some clues. Science journalist and author Philip Ball explains what we know and whether we’ll ever find the origins of life on earth.