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songjianguo銀蟲 (小有名氣)
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幾句英文翻譯，求幫助
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In general, the trans-esterification is base catalyzed while the esterification is catalyzed by acids, although alternative acid/base catalysts could be used but at prohibitive reaction rates. The FAME synthesis stage is followed by several neutralization and purification steps. Nonetheless, all conventional methods suffer from problems associated with the use of homogeneous catalysts, leading to severe economical and environmental penalties. Thishas to change in view of the large growth worldwide in biodiesel production. |
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