地球形状的问题本质上是引力和旋转共同作用下的平衡问题。

"The only thing stronger than the desire to live is the desire to love."

"There is only one real sin, and that is to persuade oneself that the second-best is anything but the second-best."

唯一能阻止我的人就是我自己。

解释：治理河道，要用疏导的办法使其通畅；治理百姓，要引导百姓使其敢言。

释义：只要有志向，就一定能成功。