It's a book by Dimson, Marsh, and Staunton that is called Triumph of the Optimists.
2
波尔斯说：波士顿研究小组中的百岁人都是高加索白人，意味着研究结果可以复制到其他种族的参与者中去。
The centenarians in the Boston group's study were all Caucasian, meaning the results should be replicated with participants of other ethnicities, Perls said.
3
据此，辛顿和鲍尔斯认为，这处火山岩相当年轻——大概几百岁。
This observation leads Sinton and Bowles to think the lava is fairly young-maybe a few hundred years old.
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