—— 请按键盘 空白键 开始游戏 ——

Randomized evaluations can help us understand what works and what doesn't in development.
我想起我那堆旧平装书,书页已经变得松软,仿佛它们曾经属于大海。
我们可以断言,没有激情,任何伟大的事业都不能完成。
Every tree we plant today is a legacy for generations to come.