—— 请按键盘 空白键 开始游戏 ——

解释:冬天不洗冰水,并不是吝惜冰;夏天不烤火,也不是舍不得火。而是因为这样做对身体不适宜。
化学不仅关乎你能制造什么,还关乎你如何制造它。
"The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion."