Halvings are roughly every 1458.333... days.
Blocks are a function of Poisson distribution at roughly every 10 minutes, adjusted every 2016 blocks, or 8-10 days.
I haven't analyzed it yet, but I would guess the avg time between retargets is shrinking.
大约每1458.333年减半一次。。。天。
区块是泊松分布的函数，大约每10分钟一次，每2016区块或8-10天调整一次。
我还没有分析过，但我猜重定目标之间的平均时间正在缩短。