Baoding balls are beautiful and useful. They're good for you physically, mentally and emotionally. You've probably seen them before but don't know how to use them. If you already own a set,  time to dust them off and get the balls rolling. 

保定球既美观又实用。它们对你的身体、心理和情绪都有益。你可能以前见过它们，但不知道如何使用。如果你已经有一套了，那么是时候把它们拿出来，让球动起来。