Bears have thick skin.

熊有厚厚的皮毛。

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In Curacao, the well-known liquor of that name is made from the thick outer skin of a native orange.

与库拉索岛同名的著名朗姆酒，就是用库拉索岛当地一种柑橘的厚外皮制成的。

youdao

Leatherbacks do not have blubber, but they do have a reptilian equivalent: thick, oil-saturated skin, with a layer of fibrous, fatty tissue just beneath it.

棱皮龟没有鲸脂，但它们有和爬行类动物相似的结构：厚且含油的皮肤，下面有一层纤维，再下面是脂肪组织。

youdao

She had most of the attributes of sainthood: a dauntingly selfless life, devotion to a higher cause, rude single-mindedness, a thick skin, and a capacity to wring the withers of the rich and powerful.

ECONOMIST: Mother Teresa

Drawn in by easy-to-digest prices and a traditional take on fish and chips, cabbies are known to queue up here for thick slices of fresh cod, fried skin-on in beef fat.

BBC: Chipping away at the history of fish and chips

Such an explanation would perhaps be easier to believe, were it not for the fact that the Kursk is the largest submarine in the world, and, unlike any Western submarine, has a twin-hull, the inner skin of which alone is 40cm thick.

BBC: Aftermath of the Kursk tragedy