Vinyl is not a natural substance but is a synthetic man-made material.
“乙烯基”并不是一种天然物质，而是一种人工合成的材料。
Photonic crystals are a dielectric structure periodic array in another dielectric structure, it is a man-made material.
光子晶体是一种介质在另一种介质中呈周期排列所构成的人造晶体。
The product of Labour is Labour embodied and made material in an object, it is the objectification of Labour.
劳动产品是固定在对象中的，物化为对象的劳动是劳动的对象化。
The product of Labour is Labour embodied and made material in an object, it is the objectification of Labour.
劳动产品是固定在对象中的，物化为对象的劳动是劳动的对象化。
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