Traditionally when a deck has a very high win rate, people begin to copy it, and it becomes a larger and larger part of the meta.
传统上当一个卡组有爆炸高的胜率，人人都开始抄卡组，然后它就占据越来越大部分的环境。
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If a deck ever became 60% of the meta, but there was a deck that handily beat it, then you could have a 60% win rate by playing that deck, and it would become the new best deck in the meta.