—— 请按键盘 空白键 开始游戏 ——

"The truth is rarely pure and never simple."
真相很少是纯粹的,也绝不简单。
解释:节俭就会产生对生产不利的因素,侈靡则造成对财富的耗费。
Mathematics is not a spectator sport; you have to play to understand.