the cycle of changes whereby nitrogen is interconverted between its free state in the air and combined states in organisms and the soil.
| 单词 | θ19529 |
| 释义 | the world > life > biology > balance of nature > environment or habitat > [noun] > sulphur or nitrogen cycle (2) nitrogen cycle1906 the cycle of changes whereby nitrogen is interconverted between its free state in the air and combined states in organisms and the soil. sulphur cycle1967 the cycle of changes whereby sulphur compounds are interconverted between sulphates and hydrogen sulphide in the air and sulphates, sulphides… |
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