The tree is rebuilt every frame. For scenes of this scale, quadtree construction is fast enough to rebuild from scratch each frame, though larger simulations may benefit from incremental updates. Each particle queries its neighborhood for potential collisions, typically checking only 5 to 15 candidates instead of all 40. Red highlights indicate colliding pairs.
春节期间，无论是孩子放鞭炮，还是全家人举杯的瞬间，都稍纵即逝。只拍一张照片，很容易遇到闭眼、表情管理失败的情况。打开实况照片，它能记录下快门前后 1.5 秒甚至 2 秒的画面。拍完后，你可以在相册里重新选择「关键帧」，总能挑出一张表情最完美的。
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They hardly meant has come to be
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Nasa's Space Shuttles, which flew for three decades, reached breathtaking highs, but also some terrible lows.，更多细节参见heLLoword翻译官方下载