—— 请按键盘 空白键 开始游戏 ——

I think that age is a very high price to pay for maturity.
资源开发必须在经济增长和环境管理之间取得平衡。
The purpose of abstraction is not to be vague, but to create a new semantic level in which one can be absolutely precise.
我们的潜力是一回事。我们如何利用它是另一回事。