这些书似乎忽然间在大小书架或书籍评论中随处可见：走上感恩之路的地图，快乐之旅，关于什么使我们轻快起来的调查，关于什么使我们沮丧的分析。
These epistles suddenly seemed to be on every shelf, inevery book review: roadmaps for gratitude, journeys toward joy, research on what makes us buoyant, analyses of what gets us down.
这些书似乎忽然间在大小书架或书籍评论中随处可见：走上感恩之路的地图，快乐之旅，关于什么使我们轻快起来的调查，关于什么使我们沮丧的分析。
These epistles suddenly seemed to be on every shelf, inevery book review: roadmaps for gratitude, journeys toward joy, research on what makes us buoyant, analyses of what gets us down.
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