这是匹高头大马。

This is a tall horse.

那男孩必须让人托着才能骑上那高头大马。

The boy had to be boosted up onto the large horse.

那匹马接跟而来，是匹高头大马，马背上坐着一位骑手。

The horse followed, — a tall steed, and on its back a rider.