Sheepskin is the skin of a sheep with the wool still on it — leather on one side, wool on the other. That wool is the point: people make coats, boots, gloves, and rugs from it because it is warm and strong.

Sheepskinsheepskin is是 the skin of a sheep with the wool still on it還帶著羊毛的羊皮 — leather on one side一面是皮革, wool on the other另一面是羊毛。That wool is the point重點就在那層毛: people大家 make coats, boots, gloves, and rugs from it會用它做外套、靴子、手套和地毯 because it is warm and strong因為它既保暖又耐用。

If the wool has been taken off and the surface is smooth, we are more likely to say sheep leather, not sheepskin, though shops are not always careful with the name. You will see real sheepskin on winter coats and on those small rugs people put on a chair or the floor.

If the wool has been taken off and the surface is smooth如果毛已經被剃掉、表面變得光滑, we are more likely to say sheep leather比較會說 sheep leather（羊皮）, not sheepskin而不是 sheepskin, though shops are not always careful with the name不過店家取名不見得那麼講究。People put on a chair or the floor人們鋪在椅子或地上 those small rugs的那種小地毯, and on winter coats還有冬天的外套上, you will see real sheepskin都看得到真正的sheepskin。

Though actually, in older American talk a “sheepskin” can also mean a diploma, because important papers were once written on animal skin; that is a side joke, not the first meaning.

Though actually不過, in older American talk早期美式口語裡, a "sheepskin"「sheepskin」 can also mean a diploma也可以指畢業證書, because important papers were once written on animal skin因為以前重要的文件是寫在動物皮上的; that is a side joke這是個旁支的說法, not the first meaning不是最主要的意思。