Arthur felt that he should be more of a man on horseback.

亚瑟觉得自己应该更像一个骑在马背上的人。

He found a picture of a man on horseback carrying a bow and arrows.

他找到了一张背着弓箭的人骑在马背上的照片。

Fortunately for me, as I was wondering what to do next, there appeared on the horizon a man on horseback, riding my direction.

幸好，就在我不知怎么办的时候，从天边出现了一个骑马的人，朝着我这个方向走过来了。

As he lifted his head, he saw a man on horseback standing on the huge rocky cliff that looked down into the valley.

当他抬起头来的时候，他看见一个骑马的人站在巨大的岩石峭壁上，峭壁俯视着山谷。

Fortunately for me, as I was wondering what to do next, there appeared on the horizon a man on horseback, riding in my direction.

不过，我是幸运的，正当我走投无路之时，从天边出现一个骑马的人向我骑来。

Unsure of how to play it, Pizarro instructed  his men to conceal themselves in the buildings surrounding the main plaza, many of which  were large enough to hide a man on horseback.

皮萨罗不确定如何下棋， 于是指示他的手下将自己隐藏在主广场周围的建筑物中，其中许多建筑物大到足以隐藏一个骑马的人。