—— 请按键盘 空白键 开始游戏 ——

过去是拼图,而遗传学提供了某些碎片。
The development of the industry depends on talent cultivation, and we must emphasize education and research.
"The best way to learn mathematics is to do mathematics."
Don’t let fear stop you from taking the first step.
"I’m the one I should love in this world. Shining me, precious soul of mine."