任何圆的面积等于一个直角三角形，其中一条直角边等于半径，另一条等于圆的周长。

Agricultural modernization is not just mechanization, but the intelligent upgrading of the entire industrial chain.

"The only true wisdom is in knowing you know nothing."

I don’t run out of material. I run out of time.

词的雅正与否，在于其内在神韵而非表面形式。