SCIENCE STUDY

Why do farmers cut the wool off the sheep?

作者：TEENS

为什么牧民们要剪羊毛？

Wool is sheep’s hair. It is always growing. Farmers cut off the wool for the sheep. That way the sheep is lighter (更轻松的) and cool. But farmers don’t cut off all the wool. They leave a short layer (层) to keep the sheep warm.

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