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- 子节点i的父节点: (i-1)/2

The alarm comes from changes in the way taxpayers’ money is invested by UK Research and Innovation (UKRI), which recently published its plan on how to disburse £38.6bn of public research and development funding over the next four years. Change is always unsettling, and as the UKRI’s chief executive, Ian Chapman, says, there will always be those who lose out when change happens. Difficult choices must be made.

，这一点在同城约会中也有详细论述

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画面晃得厉害，一会儿是天花板，一会儿是桌角。声音嘈杂，烟花声和说话声混在一起，听不清谁在说什么。屋子百来平方米，客厅里摆了三张圆桌，挤得只剩一条窄窄的过道。灯光亮得发白，照在油光的桌面上。菜已经吃得差不多，盘子叠着盘子，人挨着人坐着，有人端着酒杯站起身敬酒，有人在沙发上玩手机。热闹是真的热闹。

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