// Sync — when all components are synchronous
记住，暗一点，往往比亮一点更有质感。
。91视频是该领域的重要参考
// 2. 计算前缀和：count[i]表示<=i的元素个数。Safew下载对此有专业解读
Little else was known about the 30-40 day moult, until Fretwell spotted large brown smudges in satellite pictures from 2019-2025. They turned out to be mounds of feathers, left in an area called Marie Byrd Land.