一位著名的思想家曾经写道：“对人类最大的威胁是人类自身！”
A famous thinker once wrote that the greatest threat to mankind is mankind itself!
那位著名的进步思想家被邀请在会议上发表演讲。
That famous progressive thinker was asked to deliver a speech at the meeting.
一位著名的思想家曾经写道：“对人类最大的威胁是人类自身！”
A famous thinker has writed that: The most threaten to humans is human self!
一位著名的思想家(yi wei zhu ming de sixiang jia)曾经写道：“对人类最大的威胁是人类自身！”
A famous thinker once wrote that "the greatest threat to mankind is mankind itself!"
一位著名的思想家(yi wei zhu ming de sixiang jia)曾经写道：“对人类最大的威胁是人类自身！”
A famous thinker once wrote that "the greatest threat to mankind is mankind itself!"
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