—— 请按键盘 空白键 开始游戏 ——

Mathematics is the art of giving the same name to different things.
The forest doesn’t need us; we need the forest.
出自先秦《荀子·性恶》引古语。不知儿子的为人,看看他的朋友就清楚了;不知国君是否贤明,看看他左右的大臣是什么德行就知道了。
Sustainability is not an option; it is the only path forward for agriculture.