“phosphorus-nitrogen ratio”的概念、定义、翻译、参考文献-科学参考

单词	phosphorus-nitrogen ratio
释义	phosphorus-nitrogen ratio [`fäs·fǝ·rǝs `nī·trǝ·jǝn `rā·shō] ^OCEANOGRAPHY The proportion, by weight, of phosphorus to nitrogen in seawater or in plankton; the ratio is approximately 7:1.
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