deer的复数形式是其原型： deer意为：

n.鹿

He was caught poaching a deer on my land.

他在我家土地上偷偷猎鹿时被我当场抓住。

A visible antler behind the tree betrayed the presence of the deer.

树后面露出的角暴露了鹿的藏身之地。

The deer fell a prey to the lion.

鹿被狮子捕食了。