* @param arr 待排序数组
轮至我家时，虽由我爸掌勺，但设计菜单、采买食材、切配帮厨、收拾碗碟均由妈妈负责。通常年前大半个月，她就会拿出一张便签，细细写下预备的菜式和采买清单。，这一点在服务器推荐中也有详细论述
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When I found out my father had been adopted, I was curious to know more about his side of the family. Nothing could have prepared me for what I would discover …