不幸的是，果实从树上落下后不能保存太长时间，3到4天后就开始发酵。
Unfortunately, the fruit does not keep long when off the tree and will start to ferment after about 3 or 4 days.
如果希望某种技术在商业利用方面切实可行，首先在物料的预处理方面要求所得到的中间产品必须是容易发酵的糖份，产量高，浓度也较高，而且技术的实施成本还不能过高，还有生产过程中更不能使用有毒物质，不可以耗费太多能源，最后，所生产出来的草料油在价格方面必须能够与传统汽油一争高下。
They should not use toxic materials or require too much energy input to work. They must also be able to produce grassoline at a price that can compete with gasoline.
啤酒和葡萄酒均在历史上只限于最高酒精含量约15 %，数量，超出酵母是不利的影响，不能发酵。
Beer and wine were historically limited to a maximum alcohol content of about 15% by volume, beyond which yeast is adversely affected and cannot ferment.
印第安纳州普渡大学（Purdue University）的南希.何（Nancy Ho）已经研制出一种途径，使得酵母细胞能够发酵那些经分解植物纤维素而得的糖，而天然的酵母是不能发酵这些纤维素的。
Nancy Ho, of Purdue University, in Indiana, has already worked out a way to enable yeast cells to ferment the sugars produced by breaking down cellulose—which natural yeast cannot do.
磷酸盐。它是谷氨酸发酵过程中必需的，但浓度不能过高，否则会转向缬氨酸发酵。
Phosphate. It is essential glutamic acid fermentation process, but the concentration can not be too high, otherwise they will be to valine fermentation.
并认为细菌总数与酵母菌数量不能作为评价EM发酵饲料质量好坏的指标。
Bacterial total amount and yeast amount should not be used as quality index to EM fermentation feed.
由于微生物发酵过程的复杂性和高度非线性，更多的简单的数学模型不能很好地描述这类生化系统。
Due to the complexity and high non-linearity of microbial fermentation process, most simple mathematical models cannot describe the behavior of biochemistry systems very well.
添加酶进一步降解任何不能用于发酵的残存淀粉，增加了产品的热量。收藏。
Enzymes can be added to further break down any remaining starches that would not be fermentable and thus contribute to caloric content.
而未经脱毒处理的预处理液不能单独进行发酵。
It was also found that the pretreatment spent liquor couldn't be fermented separately without detoxification.
结果表明，与对葡糖糖的利用相比，树干毕赤酵母菌利用内醚糖的效率较低，且不能发酵产乙醇。
Results revealed that P. stipitis could utilize levoglucosan at a low efficiency compared to glucose, and could not ferment it to ethanol.
目前利用太阳能对反应器进行加热的方法比较理想，然而该工艺也同样受环境因素的制约，不能完全提供发酵过程的理想温度环境。
Although it is a better way to utilize solar energy, it has the same shortcoming that can't provide an ideal fermentation environment.
发酵法制备燃料乙醇是一种相当传统的工艺，但由于原材料的问题，迟迟不能大范围的推广。
As a traditional technology, fermentation hasn't yet been employed widely to produce power ethanol for a long time due to the limitation of raw material.
耗能大，质量不能有效控制，极大地影响了经济效益。研究和设计发酵的自动控制系统，对改造传统工业。
This traditional mode of production consumes excessive amount of energy and has no guarantees of quality control.
耗能大，质量不能有效控制，极大地影响了经济效益。研究和设计发酵的自动控制系统，对改造传统工业。
This traditional mode of production consumes excessive amount of energy and has no guarantees of quality control.
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