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For concert-goer, Rhia, 27, from London, the initial issues with the arena had given her reservations about watching a concert there.

💡 k: 数据范围, d: 最大位数, n: 数据量

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当需求不稳定、价格下探、技术迭代叠加在一起时，这门生意的风险结构就变得复杂。