Compost is a dark, rich material added to soil to improve it.
混合肥是一种能够改良土壤的黑乎乎的肥沃物质。
Milk was used as material for fermentation and pollen polysaccharide was added into to produce yoghourt.
以牛乳为原料进行发酵,并添加花粉多糖研制多糖酸奶。
Added to clothing, the material protects security officers and soldiers across the world.
这种材料填进衣服里就能保护全世界的安全人员及士兵。
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