One day, by chance, Goodyear dropped a small piece of molded rubber on to a stove at the same time a piece of sulphur slipped out of his hand.

 
  • 有一天,古德伊爾偶然把一小塊成型像膠掉在爐子上,同時(shí)又有一塊硫從他手中滑下。
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