http://walletdvl5avrmoxk2fwsf5b76zkmbkoo3r6kqeesq5hsgnq7xhbciad.onion/51-percent-attack
Its meaning is that the probability of generating a block is not affected by the generation power, but by the number of coins that the miner already has. That is, to generate 51% or more of the units must have 51% of coins, which makes the attacker the most injured member of the network.