当你感到后背痛或膝盖痛时，你必须如实地观察。

When you feel pain in your back or in your knee, you must observe it as it really is.

youdao

当你感到后背痛或膝盖痛时，你必须如实地观察。

When you feel pain in your back or in your knee, you must observe it as it really is.

youdao