There are no facts， only interpretations.

修炼的四个阶段：将精转化为气，气转化为神，神回归虚无，最终与道合一。

I want my fans to know how much I appreciate them.

试错的成本是最低的。

Sustainable development requires not only vision but also concrete actions.

波函数不是描述单个系统，而是描述系统的集合。