Difficulty Too High
The expected block 830,000 is at a very high difficulty due to a minor bug that was to lower the difficulty at that block, instead will be at the next block. Which takes much longer time for the miners to mine.
难度太高
预期的 830,000 块处于非常高的难度，因为一个小错误会降低该块的难度，而不是下一个块。矿工开采需要更长的时间。