—— 请按键盘 空白键 开始游戏 ——

写文章必须溯源经典,并参考诸子史书,这样才能自成一家而不因袭前人。
I’m a great believer in solving hard problems by using a checklist. You need to get all the likely and unlikely answers before you; otherwise it’s easy to miss something important.
创新是可持续农业的关键。