因而，相对于汽油来说，乙醇并没有环保优势。
Thus, ethanol offers no environmental advantage over gasoline.
混合动力汽车具有使用成本优势和环保优势，但在实用化和商品化方面却不尽人意。
The hybrid vehicle has cost and environmental protection advantages. But people are not satisfied with its utilization and commercialization.
该工艺收率高、原料易得、成本适中、工艺条件温和，具有质量和环保优势，非常适应于工业化生产。
The process has many advantages such as high yield, available raw materials, moderate cost, mild reaction conditions, good quality and environmental protection, it is very fit to be industrialized.
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