When a child shows up for school, and is not physically and mentally ready to learn, he or she never catches up.

When a child shows up for school, and is not physically and mentally ready to learn, he or she never catches up.

当一个孩子出现在学校，身体和精神上都没有准备好学习，他或她永远不会赶上。

-- C. Everett Koop 库普