selfish mining

A selfish miner withholds solved blocks to gain an unfair advantage over other miners in the network.自私挖矿者会扣留已解出的区块，以便在网络中的其他矿工面前获得不公平的优势。

Selfish mining only becomes profitable above a certain hash rate threshold, making it a theoretical risk for smaller chains.自私挖矿策略只有在超过一定的算力阈值时才能盈利，这使得它对于较小的链来说只是一种理论上的风险。