泉水化学成分变化研究一直是国内外学者研究的热点问题之一。

At home and abroad, research on chemical composition of springs water is one of the hot problems.

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叶兴庆说，尽管国内生产仍是中国最重要的政策，进口已经成为一个日益重要的成分。

Though domestic production is still its most important policy, imports have become an increasingly crucial component, Mr. Ye said.

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结果与结论国内，超临界流体技术是从药用植物中分离有效成分的先进技术手段之一；

Results and Conclusions The supercritical fluid technology is one of the advanced technological means to separate effective component from the medical plant in China.

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