1·In fact, most biofuels are still based on ethanol.
事实上，大多数生物燃料仍然以乙醇为基础。
2·I thought we could start by asking our audience what car engines were first designed to run on-fossil fuels or biofuels.
我想我们可以先问问观众哪种汽车引擎被最早设计为使用化石或生物燃料。
3·Until recently, the assumption has been that cellulose would take over from sugar and starch as the feedstock for making biofuels.
直到最近，这个假定认为纤维素会取代蔗糖和淀粉作为给料，制造生物燃料。
4·We've done enough background reading, but I think we need to organise exactly what we're going to say about biofuels during the presentation, and the order.
我们已经阅读了足够多的背景资料，但我认为我们需要组织好我们在演讲期间将要谈论的关于生物燃料的内容，以及顺序。
5·Liquid biofuels include bioalcohols.
液体生物燃料包括生物醇。