A major portion of the soil organic matter is derived from the added and residual vegetative material.

加进去的和残留下来的植物物质则是土壤有机质的主要来源。

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The mineralized organisms and organic matter absorbed in ores in the deposit are systematically investigated, which reveals that they are all derived from bacteria and algae.

本文详细研究了矿床中的矿化生物以及矿石中的吸附有机质，证实它们源自菌藻生物。

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Biomass is the most widespread material, which includes all animals, plants and micro-organisms and substances derived from these are life, excretion and metabolism of many organic matter.

什么是生物质？生物质是地球上最广泛存在的物质，它包括所有动物、植物和微生物以及由这些有生命物质派生、排泄和代谢的许多有机质。

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