on horseback的用法和樣例：
例句
- There were two soldiers on horseback.
有兩個士兵騎著馬。 - Two cowboys rode herd on the cattle being driven to market.
兩個牛仔騎著馬，看管著趕往市場上去的牛群。 - Knights used to tilt on horseback.
騎士們常騎在馬背上用槍刺殺。 - Fasten the saddle on the horse's back.
把鞍子系在馬背上。 - Knights used to tilt on horseback.
騎士們常騎在馬背上用槍刺殺。 - He lifted up his little son, and mounted him on the horse.
他把小兒子舉起來，讓他騎在馬背上。
