As black as ink and isn't ink 黑如墨但不是墨

As black as ink and isn't ink,
黑如墨但不是墨，

As white as milk and isn't milk,
白如牛奶但不是牛奶，

As soft as silk and isn't silk,
軟如絲但不是絲，

And hops about like a filly-foal.
然後像一匹小馬般跳躍。


［按］

好吧，應該是謎語