A fleece, again, is destroyed as a fleece by being spun into thread; and the thread cannot be used as thread when woven into cloth.

再者，羊毛在纺成线时会被毁掉，而线在织成毛料时再也不能当线使用。

youdao

Their milk looks and tastes like the real thing, but once its proteins are filtered and purified into a fine white powder, they can be spun into tough thread.

FORBES: Charlotte's Goat