You have three layers of skin which act as a barrier against diseases, poisons and the sun's harmful rays.
皮肤有三层作为屏障，它们可以保护你不受到疾病，有毒物质和太阳有害的射线的伤害。
You have three layers of skin which act as a barrier against disease, poisons and the sun's harmful rays.
皮肤有三层，它们是防病、防毒、抵御太阳有害光线侵害的一道屏障。
You have three layers of skin which act as a barrier against disease, poisons and the sun's harmful rays.
皮肤有三层，像是三层屏障，可以防病、防毒、抵御有害太阳光线的侵害。
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