horseback

馬背多用於 on horseback

The guards patrolled the border on horseback for hours.

警衛騎著馬在邊境巡邏了好幾個小時。

騎馬的限定用法

We signed up for a horseback tour through the valley.

我們報名參加了穿越山谷的騎馬行程。

騎著馬美式

She learned to ride horseback when she was seven.

她七歲就學會騎馬了。