① understandable意為“可以理解的。”
The form is understandable to everyone. 這張表每個人都能理解。
That's an understandable mistake. 那是一個可以理解的錯誤。
② understanding意為“了解的,寬容的,能諒解的?!?
An understanding person is good at understanding people and their problems. 善解人意的人善于理解他人和他人的問題。
She gave me an understanding smile. 她向我會心地笑了笑。