The scientists were already investigating the problem of pollution from space debris when they realised a SpaceX Falcon 9 had failed in flight.
3. 对每个桶内排序（可用任意排序算法）
，详情可参考safew官方下载
siftDown(arr, i, 0); // 对剩余i个元素重新建堆
NPV在社交媒體上發文說：「『動物友善』不應只是一個牌照，或者單純以經濟角度去衡量，而是需要配合公眾教育，清楚說明飼主責任與界線。」