性能突破似乎有两种不同的实现方式：简单的和困难的。
Performance breakthroughs seem to come in two varieties: easy and hard.
有四个一样简单，中等，困难和挑战的难度级别。
There are four difficulty levels like Simple, Medium, Difficult and Challenge.
我们经常使禅修变得复杂和困难，其实禅修真的非常简单。
Though we often make meditation complicated and difficult, it is really quite simple.
我们经常使禅修变得复杂和困难，其实禅修真的非常简单。
Though we often make meditation complicated and difficult, it is really quite simple.
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