No,they are deer.
不,它们是(普通的)鹿。
I ask people why they have deer heads on their walls.
我问人们,为什么你们把鹿的脑袋挂在墙上。
Snails and deer:they live together.They have a symbiosis.
蜗牛和鹿住在一起,它们有一种共生关系。
The land around the ranch is a protected wintering area for elk, deer and bighorn sheep.牧场周围的土地是受保护的麋鹿、鹿和大角羊的越冬区。这句话中deer的意思是鹿,复数形式是deer,deer是一个单复同形的名词。一群鹿可以表达为a herd of deer。