【英语时差8,16】氢动力汽车车（下）

The second challenge is that there are relatively¹ few filling stations equipped with hydrogen pumps. According to The National Hydrogen Association, as of 2008 there were sixty-one hydrogen fueling stations in the U.S. So even if scientists find a way to produce and store hydrogen cheaply, it would still take many years to build enough infrastructure² to service millions of fuel cell powered cars. Today, as gas electric hybrids³ sell in greater numbers, and electric plug in cars begin to hit the market, scientists keep working on hydrogen technologies. So hydrogen may still be an important part of the clean energy puzzle. But it’s a long range solution.

1 relatively   

adv.比较...地，相对地

参考例句：

• The rabbit is a relatively recent introduction in Australia.兔子是相对较新引入澳大利亚的物种。
• The operation was relatively painless.手术相对来说不痛。

2 infrastructure   

n.下部构造，下部组织，基础结构，基础设施

参考例句：

• We should step up the development of infrastructure for research.加强科学基础设施建设。
• We should strengthen cultural infrastructure and boost various types of popular culture.加强文化基础设施建设，发展各类群众文化。

3 hybrids   

n.杂交生成的生物体( hybrid的名词复数 )；杂交植物（或动物）；杂种；（不同事物的）混合物

参考例句：

• All these brightly coloured hybrids are so lovely in the garden. 花园里所有这些色彩鲜艳的杂交花真美丽。 来自辞典例句
• The notion that interspecific hybrids are rare is ill-founded. 有一种看法认为种间杂种是罕见的，这种看法是无根据的。 来自辞典例句