The, the fuels created by plant and animal remains over millions of years.

矿物燃料是由动植物的遗体经过数百万年腐化而来的.

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Falling dead vegetation and animal - remains ensure a regular return of nutrients to the soil.

枯死凋落的植物和动物的遗骸可以确保土壤肥力的正常恢复.

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Hou shop brush is the main raw material for animal remains and tail hair.

侯店毛笔的主要原料是动物的毫毛和尾毛.

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