some sheep是可数还是不可数

　　There seems to be some sheep eating grass on the hill.

　　山上似乎有一些羊在吃草。

　　As sheepherders, Zang and Gu lost some sheep due to their neglect.

　　臧与谷两个牧羊人，他们都因疏忽而丢失了一些羊。

　　So the news last summer that some sheep are shrinking came as a surprise.

　　因此，去年夏季传出有些羊正在缩小的消息，着实令人大吃一惊。