The basic methods are physical method, biological method and systems analysis.
基本方法是：物理学方法、生物学方法和系统分析方法。
The correlation analysis showed that the physical mixing course of water from land was the major factor influencing the nutrient salt, and the biological and chemical factors were secondly.
相关分析表明，陆源水的物理混合过程是影响诸营养盐含量的主要因素，生物、化学作用次之；
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