deer是可数名词，但是单复同形，即单数是deer，复数也要写成deer。deer，作名词时意为“鹿，人名；(英)迪尔”。
相关介绍
It's going to be the death knell of the red deer.
这将导致马鹿的灭绝。
The Trust's annual meeting has decided by a narrow majority to ban deer hunting.
国民托管组织的年度会议以微弱的多数票决定禁止猎鹿。
By cross-breeding with our native red deer, the sika deer have affected the gene pool.
通过与我们本地的赤鹿杂交，梅花鹿的基因库已经发生了改变。
