海洋化学家们研究海水的化学成分，他们还分析流入大海的污染物的种类和数量。
Water chemists study the chemical composition of seawater. They also analyze the types and quantities of pollutants entering ocean waters.
海洋化学家们研究海水的化学成分，他们还分析流入大海的污染物的种类和数量。
Water chemists study the chemical composition of seawater. They also analyze the types and quantities of pollutants entering ocean waters.
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