最简单诠释
Simplest interpretation
以上为机器翻译结果，长、整句建议使用 人工翻译 。
至于内在工程有不同的层面，不过最简单的诠释方式就是通过调理内在的“化学反应”，从而让你本性中就是快乐的。
So inner engineering is on many different levels but the simplest way of expression is this, it's a way of fixing your chemistry, so that it's joyful by its own nature.
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