Hydrogen is "just about the worst possible vehicle fuel", says Robert Zubrin, a rocket scientist and the author of "Energy Victory", a book on the post-petroleum future.
氢“只是最坏情况下的汽车燃料选择，”火箭科学家罗伯特·祖布林说，他还是《能源的胜利》的作者，这是一本讲述关于后石油未来的书。
One of the best resources for discount usability testing is a new book by Steve Krug, “Rocket Surgery Made Easy.”
“折扣可用性测试”最好的参考资料是 Steve Krug的新书《火箭手术创造易用性》。
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