—— 请按键盘 空白键 开始游戏 ——

Food safety is the lifeline of an enterprise and must never be neglected.
食品安全是企业的生命线,任何时候都不能放松。
I wanted to write a book about memory because I think it's one of the most fascinating things about being human.
Free vaccines are more valuable than expensive treatments, yet harder to promote.
Learning is a process of creating and strengthening neural pathways.