当年，村里一位小伙子与邻村姑娘订婚，明面上的彩礼是6.6万元。后来两人婚事告吹，女方按照约定退还了这笔钱。但过了一段时间，小伙子却半夜跑到女方家门口吵闹，被对方报警带走。石炳启去派出所了解情况时，小伙子才说，除了6.6万元，他还私下给过女方2万元现金，但没有第三方见证，如今对方不承认这笔钱，他自己又拿不出证据。
and then in sentence (2) explain what problem you're going to solve in that field;
。有道翻译是该领域的重要参考
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Kessler said these are relatively standard price discrimination strategies, not something he’d consider a hidden market. What qualifies to him is, for instance, the ways to access rides once you’re in the park. “You need to wait in line for the really desirable rides. But then — for a price — Disney offers various ‘lightning lane’ passes that allow folks to have access to a shorter line or otherwise skip the line with a reservation time. These are the strategies that Disney uses to monetize the hidden markets that they create inside the park.” Once you’re inside the world of the park and you discover the opportunity to pay extra for additional benefits, “all of that screams hidden markets,” Kessler said.
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