with作定语吗

Then, after the easy rolling Midlands, the dramatic Peak District, with its genuine steep slopes, never fails to astonish me, for I feel that it has no business to be there.

easy rolling在这是什么词性？with its genuine steep slopes作定语吗？

Then, after the easy rolling Midlands, the dramatic Peak District, with its genuine steep slopes, never fails to astonish me, for I feel that it has no business to be there.

【翻译】然后，在缓慢起伏的中部区域后面，是激动人心的山顶区，以其真的陡峭的斜坡，无不令我惊讶，由于我感觉它没理由在那里。

easy rolling Midlands：

easy 是副词，修饰rolling，意思是：缓慢地

rolling 形容词：起伏的。