並前往https://zh-cn.facebook.com/yangcongmath/videos/%E5%9C%93%E7%9A%84%E9%9D%A2%E7%A9%8D%E5%85%AC%E5%BC%8F%E5%8F%AF%E5%A6%82%E4%BD%95%E7%90%86%E8%A7%A3/729988987467039/