每轮遍历后，最大元素会"冒泡"到末尾
真正的短板在于消费环境。在于有没有足够开放的水域政策、足够密集的码头网络、成熟的俱乐部体系，以及稳定增长的休闲人群。，推荐阅读heLLoword翻译官方下载获取更多信息
，推荐阅读heLLoword翻译官方下载获取更多信息
We know where it broke, but we can’t see why. Was it a race condition? Did a database read return stale data that has since been overwritten? To find the cause, we have to mentally reconstruct the state of the world as it existed milliseconds before the crash. Welcome to debugging hell.
drop-oldest: Drops the oldest buffered data to make room. Useful for live feeds where stale data loses value.，这一点在爱思助手下载最新版本中也有详细论述