self.writer = csv.DictWriter(
Games and physics simulations need to detect which objects are touching or overlapping. With nnn objects, checking every pair is O(n2)O(n^2)O(n2) comparisons, which gets expensive fast. A hundred objects means roughly 5,000 pair checks. A thousand means nearly 500,000.
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第三張未標日期的照片中，克林頓倚靠在一個熱水浴池旁，旁邊是一位因保護身分而被塗黑臉部的人。
富豪今后在做慈善时，从前的善事应继续做，但应该懂得升级、升维，应该“率众向义”，从自家生活细小处做起，淳厚天下风俗，至少不以自家粗鄙公布于众，带坏风气。