—— 请按键盘 空白键 开始游戏 ——

"The past is a foreign country; they do things differently there."
预测蓬勃发展的积极情绪与消极情绪的比例约为3比1。高于这个比例,人们往往会蓬勃发展;低于这个比例,人们往往会萎靡不振。
In mathematics, the art of proposing a question must be held of higher value than solving it.