—— 请按键盘 空白键 开始游戏 ——

As in geometry the most natural way of beginning is from a mathematical point, so is the same method in observations and natural history the most genuine, simple, and instructive.
煤炭开采造就了现代英国,即使我们向更清洁的能源过渡,也必须尊重这一传统。