双语例句原声例句
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一个叫罗伯特·普拉斯的飞行员发明了滚轮行李箱，并且在1991年取得专利权。
A pilot named Robert Plath invented the wheeled suitcase, and patented it in 1991.
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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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$firstVoiceSent
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