Smoking and alcohol are real skin enemies.

吸烟和饮酒是皮肤的大敌。

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The first stage involves growing a layer of real skin around a sample of the bulletproof skin, which takes about five weeks.

第一阶段的实验需要在防弹皮肤的样本周围培养出一层真正的皮肤，这需要大概五周的时间。

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That was real crocodile skin.

那是真正的鳄鱼皮。

《柯林斯英汉双解大词典》

Real leopard skin can last for more than 20 years.

CNN: Wild leopards threatened by religious tradition in Africa

Americans accustomed to discussing race politely, or not at all, might follow the campaign without a real sense of the potency of skin color.

NEWYORKER: The Hardest Vote

Like subprime, many of these people are not real buyers because they have no skin in the game and endless government relief when a default occurs.

FORBES: FHA Will Cost Taxpayers $150 Billion