求翻译：由于其在自然界存在很少，分离提取成本很高不经济，而微生物合成工艺困难，作者认为化学合成制取木糖醇工艺最有市场前景；最后讲述了木糖醇的应用。是什么意思？

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Because of its nature, there is very little separation extraction is not economic, high cost and micro-organisms, the author believes that chemosynthesis synthetic technological difficulties take xylitol craft the most promising market; finally describes xylitol applications.

Are very few as a result of it in the nature existence, the separation extraction cost is very high is uneconomical, but the microorganism synthesis craft is difficult, the author thought the chemical synthesis system takes the xylitol craft most to have the market prospect; Finally narrated the xyl

Because of its nature rarely, high cost of extraction uneconomical, and microbial synthesis difficult, the author considers chemical synthesis most market production of xylitol and finally tells the application of xylitol.

正在翻译，请等待...