—— 请按键盘 空白键 开始游戏 ——

人心比山川更险恶,比了解天象更困难。
As in geometry the most natural way of beginning is from a mathematical point, so is the same method in observations and natural history the most genuine, simple, and instructive.
The voice is the first instrument.
Collaboration across industries and borders is essential to address the global challenges in food security.