sheep是可数名词吗?there`s

　　The island is populated largely by sheep.

　　这个岛的主要生物是绵羊。

　　The minister preached a sermon on the parable of the lost sheep.

　　牧师讲道时用了亡羊的比喻。

　　The first task was to fence the wood to exclude sheep

　　第一项任务就是把树林围起来不让羊进去。

　　I'd kinda like to have a sheep farm in New Mexico

　　我有点儿想在新墨西哥州开一个牧羊场。

　　Sheep's milk is produced in much the same way as goat's milk.

　　绵羊奶和山羊奶的生产过程差不多。