罗伯特•林赛在这部影片中担任配角。
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。
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.
他和罗伯特曾计划在阿林顿举行的葬礼上朗读约翰演说的节选，但最后放弃了这一做法。
He and Robert had planned to read excerpts from John's speeches at the Arlington burial service. At the last moment they chose not to.
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