Scores of research firms are developing conversion methods to process a variety of raw materials into ethanol.

几十家研究公司正在研究把各种各样的原材料转化成乙醇的方法。

youdao

Scores of research firms are developing conversion methods to process a variety of raw materials into ethanol.

几十家研究公司正在研究把各种各样的原材料转化成乙醇的方法。

youdao