老托福听力93篇集锦:Part C(MP3+字幕) 第77篇:可替代能源
日期:2015-02-28 09:11

(单词翻译:单击)

Since we've been discussing alternative fuels lately, I wanted to pass on to you some information I read about a new fuel that's been in the news a lot lately.

It's called A-21.

It's composed of water and a chemical known as naphtha.

It seems to be a very promising fuel because it's much cleaner than the gasoline that we use today.

That's not to say that it doesn't pollute, but it is cleaner.

A-21 isn't like some other alternative fuels that require completely new types of engines.

A-21 still works in regular, everyday combustion engines like the ones in cars with only minor mechanical modifications.

So changing over wouldn't be a big deal.

You may doubt some of these claims as many researchers have.

Some people feared that because it contains about 45 percent water it would freeze in the winter.

But a small amount of antifreeze was added to it, and that seems to have solved the problem.

A-21 has recently undergone street tests in buses in Reno, Nevada.

So far it seems to work just fine.

This is a good thing, especially in Nevada, because the state government there has passed a law requiring that a large percentage of vehicles in Nevada run on alternative fuels.

A-21 should help.

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重点单词
  • minoradj. 较小的,较少的,次要的 n. 未成年人,辅修科
  • alternativeadj. 两者择一的; 供选择的; 非主流的 n. 替换
  • gasolinen. 汽油
  • freezev. 冻结,冷冻,僵硬,凝固 n. 结冰,冻结
  • promisingadj. 有希望的,有前途的
  • combustionn. 燃烧
  • composedadj. 镇静的,沉着的
  • mechanicaladj. 机械的,力学的,呆板的 n. (供制版用的)样