Joyfulness is not necessarily revealed on the baby smiling face, displays on the baby body jumping for joy, although they are one of joyful representations, but they are not joyful complete.

• 快乐不一定就是显露在宝宝脸上的笑容、表现在宝宝肢体上的雀跃，虽然它们是快乐的表象之一，但它们绝不是快乐的全部。