地球形状的问题本质上是引力和旋转共同作用下的平衡问题。
珍贵的宝物容易求得,而真心相待的郎君却难以寻觅
Food safety is the lifeline of an enterprise and must never be neglected.
Quality means doing it right when no one is looking.
"Stories are the most important thing in the world. Without stories, we wouldn't be human beings at all."