// 1. 建堆：从最后一个非叶子节点开始向上调整
to support these cards was the very first of the midrange line, the 1969
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It also became one of the early examples of user interface design conventions such as badges, rating buttons, sharing and recommendation features which have largely become standard features across media platforms today.
But in 2022 summer sea ice in much of Antarctica dramatically shrank, falling from an average of 2.8m sq km to a record low of 1.79m sq km in 2023.