Finally, it was Robert Plath, who was an airline pilot, who invented a new, wheeled suitcase, which he patented in 1991.

后来一个叫罗伯特·普拉斯的飞行员，发明了一种滚轮行李箱，并且在1991年取得专利权。

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Well, it apparently is not so obvious because in the Americas, before Columbus came-- " pre-Columbian America-- there were no wheeled vehicles anywhere.

好吧，从表面上看这似乎不那么显而易见,因为在美洲大陆，在哥伦布到来之前-,在“前哥伦比亚美洲-,根本没有任何轮式交通工具存在。

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We had civilizations-- Aztecs, Mayas, Incas, etc.-- but no wheeled vehicles.

在各个文明中-,例如阿兹台克，玛雅，印加-,都没有轮式交通工具的踪影。

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Anyway, it's interesting the wheeled suitcase came in in 1972.

总之，有意思的是轮式行李箱,在1972年问世了。

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The idea of putting wheels on suitcases goes back only to 1972 and it was Bernard Sadow who invented-- this is amazing, right--the wheeled suitcase and he got a patent on it.

在行李箱上加轮子的想法,可以追溯到1972年2,是伯纳德？沙度发明的-,这很神奇，对吧,并且他凭此获得了专利。

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You probably own a wheeled suitcase, right?

你们应该都有轮式行李箱吧，对吗？

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.. So, why didn't somebody think of-- you're sitting there with your child playing with a wheeled toy and then you're going out to carry some heavy stuff and you're dragging it along the ground.

因此，为什么有人想不到-,当你和玩着玩具车的小孩,坐在一起,然后你出去,拿一些很沉的东西,你却是生拉硬拽地把它放在地上拖过来。

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