Doubt-Richard Feynman

演讲生活社会带字幕
2.6分钟 2743次

人生在世,要对一切抱持怀疑,还是宁愿不知,也不想得到错误答案?

  • 时长：2.6分钟
  • 来源：互联网 2016-07-19

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