关于挖矿难度和产出的问题

https://en.bitcoin.it/wiki/Difficulty
What network hash rate results in a given difficulty?
The difficulty is adjusted every 2016 blocks based on the time it took to find the previous 2016 blocks. At the desired rate of one block each 10 minutes, 2016 blocks would take exactly two weeks to find. If the previous 2016 blocks took more than two weeks to find, the difficulty is reduced. If they took less than two weeks, the difficulty is increased. The change in difficulty is in proportion to the amount of time over or under two weeks the previous 2016 blocks took to find.
比特币的难度调整是根据过去2016块的平均产出时间来算的。也就是说等最后几十个块的时候降低算力不会对难度调整有太大的影响。
莱特币应该也是同样的情况。
所以不要听某些SB或者别有用心的人的鼓吹停下你的矿机。

2楼描述正确，1楼描述错误
如果难度降低，那不管这段时间的总算力多少，单位算力的产出都会升高。
并且在这段时间内，区块平均间隔时间将少于2.5分钟。
比如在上一个2016块时间内（约3.5天），有一半的矿机停机，那下一个周期，难度将降低一半，理论产出提升一倍。此时如果所有矿机都重新开挖，都将获得2倍的理论产出，并且在1.75天内挖光2016区块。
很多机枪池操山寨币就是用这个原理，低难度进入，抬高难度，高难度退出

谢谢楼上的补充，这下我完全明白了。
比特币真的是越学越发现自己不懂的很多啊。