—— 请按键盘 空白键 开始游戏 ——

Sustainability isn't a choice anymore—it's a responsibility we owe to future generations.
No one had ever had such a friend, so affectionate,so loyal and so skillful.
The discovery of DNA structure was like unraveling a very complex puzzle.
I think the only free man can feel this kind of excitement, a free man step on a long journey, towards the uncertain future.