Biological treatment is one of effective methods for removing such a kind of substances.

生物处理是有效去除该种类物质的方法之一。

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In the immense and vast global biosphere, there exists a kind of noteless melanocratic organic matter which is humic substances.

在浩瀚广袤的地球生物圈里，蕴藏着一种不引人注目的暗色有机物，这就是腐植酸类物质。

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then you can see how you can have very easily different arrangement of corpuscles within substances, a kind of atomic theory.

那么就能轻易地看到,物质中微粒的不同构成，那就是原子理论。

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What the researchers did was give rats two substances found in foods: Omega-3 fatty acids, a kind of fat that the body can't make enough of on its own, and uridine, one of the building blocks of DNA, which promotes a cell's energy-making process.

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