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چرا حرف X مجهول است؟
4,341,976 views |
تری مور |
TED2012
• February 2012
Read transcript
چرا حرف X نماد مجهول است؟ در این بحث کوتاه بامزه، تری مور جواب شگفت آوری را میدهد.
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