“freshwater ecosystem productivity”的概念、定义、翻译、参考文献-科学参考

单词	freshwater ecosystem productivity
释义	freshwater ecosystem productivity Encyclopedia 理学淡水生态系统生产力释 freshwater ecosystem productivity淡水生态系统生产力有广义和狭义之分。从广义上讲，是指淡水水体中所有生物的总生产能力，而不是仅局限于对人类有价值的所谓经济产物；狭义上来说，是指淡水水体中能满足有经济价值的生物生长、发育、繁殖的性能，水体中生产的经济产品越多，则其生产力越高。淡水生态系统生产力的大小，不仅与水体理化特性（如肥沃程度）有关，也与其中生物组成及人类的经济活动有关。
随便看	measurement of laser power or energy measurement of length measurement of lightning current with coaxial shunt measurement of lightning current with Rogowski coil measurement of line profile not related to a datum measurement of line profile related to a datum measurement of longitudinal mode measurement of loss of optical fiber measurement of loudness measurement of lower limb bones measurement of lower limb muscle measurement of magnetic field intensity measurement of magnetic fields measurement of magnetic properties measurement of magnetic quantities measurement of magnetic screen measurement of mineral magnetism measurement of Ming Great Wall measurement of momentum distribution measurement of motor parameters measurement of multiple degree of freedom with spectrometry method measurement of neck muscle measurement of numerical aperture of multimode fiber measurement of operating parameters of pumping station measurement of optical elements surface deviation

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