Don't mention horse racing. He'll just blather about the subject for hours once he gets started.
可别提赛马. 他一旦讲起这个话题来就喋喋不休说个不完.
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It's believed that people primarily blather to themselves when alone so as not to appear nuts.
据信,人们大多是在独处时才会随口自言自语,因为当着人这样自己会觉得很傻.
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