Experimental results indicated that a higher extraction efficiency could be achieved by using organic solvents with proper polarity.

结果表明，不同极性的有机溶剂对于极性不同的化合物的萃取效率明显不同。

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Finally, the sentence topics extraction and polarity discrimination method to improve, and design with rule-matching algorithm applied to the calculation of the sentence to the sentiment orientation.

最后，对中文句子主题抽取与极性判别方法进行了详细的方法改进，并提出运用搭配规则匹配算法进行句子情感倾向的计算。

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