—— 请按键盘 空白键 开始游戏 ——

Marine protected areas are not just sanctuaries; they are investments in our future.
The definition of a good mathematical problem is the mathematics it generates rather than the problem itself.
All businesses need to be young forever. If your customer base ages with you, you're Woolworth's.
凡是现实(存在)的就是合理的,凡是合理(存在)的就是现实的。