丁酸发酵是一种终产物抑制发酵，因此微生物发酵法生产丁酸收率低而经济效益差，目前尚难替代化学合成法。
Because of butyric acid fermentation inhibited by its end products, microbial fermentation is both low productive and expensive nowadays and difficult to compete with chemical synthesis.
换句话说，这位制衣商由于经济效益而获得了以前没有的利润。
In other words, the manufacturer, as a result of his economies, has profits that he did not have before.
当前，我国城市经营中存在的突出问题是，过分强调经济效益而忽视社会效益，见物不见人。
At present, the remarkable question in the city management of our country is: Over stressing economic benefits but neglecting social benefits, only paying attention to material but not people.
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