* @param arr 待排序数组
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19:50, 27 февраля 2026Из жизни
New analysis of Apollo Moon samples finally settles debate: « For decades, scientists have argued whether the Moon had a strong or weak magnetic field during its early history (3.5 - 4 billion years ago). Now a new analysis shows that both sides of the debate are effectively correct. »
· 赵敏 · 来源：admin资讯