Effect of Environment and Nutrient Factors on the Content of Nitrogen and Phosphorus in Two Duckweeds Species: Spirodela polyrrhiza and Lemna aequinoctialis是什么意思_Effect of Environment and Nutrient Factors on the Content of Nitrogen and Phosphorus in Two Duckweeds Species: Spirodela polyrrhiza and Lemna aequinoctialis在线翻译_英语_读音_用法_例句