—— 请按键盘 空白键 开始游戏 ——

采矿业的创新不是可选项,而是生存必需。
世界需要可靠的能源,而煤炭仍然在其中发挥着关键作用。
不要看时钟,做它该做的事。继续前进。
Learning is not a passive process; it involves the active construction of knowledge.
The obligation of subjects to the sovereign is understood to last as long, and no longer, than the power lasteth by which he is able to protect them.
数学之美不在于其复杂性,而在于其简洁性以及它揭示隐藏真理的方式。