—— 请按键盘 空白键 开始游戏 ——

The mining industry must lead in demonstrating how extractive operations can coexist with environmental stewardship.
透明度建立信任——我们有责任向客户展示我们完整的环境影响。
在变革的时代,学习者将继承地球,而那些博学的人会发现自己装备精良,却要面对一个不复存在的世界。
Mathematics is not a spectator sport. You have to get involved.