—— 请按键盘 空白键 开始游戏 ——

音乐是我的语言,也是我的沉默。
The investor's chief problem—and even his worst enemy—is likely to be himself.
In the world of mathematics, every question leads to another, creating an endless web of knowledge that connects all areas of science.
Quality and safety are the lifelines of aquatic products, we must strictly control quality.