我知道有些人不相信我们可以完成所有这些事情，我理解他们所持的怀疑态度。
I know there are those who don't believe we can do all these things. I understand the skepticism.
“我很高兴你们中的大多数不相信进步会来得很快……不要怀疑我们前进的方向以及我们所要到达的目的地，”奥巴马说。
"I appreciate that many of you don't believe progress has come fast enough... do not doubt the direction we are heading and the destination we will reach," said Obama.
一些气象怀疑论者不相信全球变暖是燃烧化石燃料的结果。
Someclimate skeptics don't believe thatglobal warming is a result of burning fossil fuels.
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