siftDown(arr, i, 0); // 对剩余i个元素重新建堆
用户只需长按聊天中的图片，点击「查看该图片包含的聊天」，即可精准锁定这张图的「流向」，查看它在哪些单聊或群聊中使用过。，这一点在im钱包官方下载中也有详细论述
“一切贪图安逸、不愿继续艰苦奋斗的想法都是要不得的，一切骄傲自满、不愿继续开拓前进的想法都是要不得的。”，推荐阅读服务器推荐获取更多信息
Apple and Netflix have entered into a rather surprising partnership. The dynamic streaming duo will share Formula 1 programming, according to The Hollywood Reporter. The deal allows Netflix to stream the F1 Canadian Grand Prix in May, along with Apple TV. On the flipside, Apple TV and Netflix will both air season eight of the docuseries Drive to Survive.