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  3. Inventors and Their Inventions New inventions are appearing every day to make our lives easier, longer, warmer, speedier and

Inventors and Their Inventions New inventions are appearing every day to make our lives easier, longer, warmer, speedier and

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问题                                                               Inventors and Their Inventions
   New inventions are appearing every day to make our lives easier, longer, warmer, speedier and so on. But only a few inventors design a new machine or product that becomes so well known that the invention, named after its creator, becomes a household word. Here are four famous inventors and the inventions that are named after them:
   1. John Bowler, a London hatter who designed the hard round hat known as the bowler in about 1850 . It has become the symbol of a respectable British man.
   2. Louis Braille (1809-1952), born in France. He was blinded as a child. In 1942 he developed his own alphabet patterns known as Braille by which the blind could read by touch.
   3. Rudolf Diesel (1858:1913), a German engineer who invented the diesel engine in 1897 and so began a transport revolution in cars, Lorries and trains.
   4. Charles Rolls, a car salesman who with the engineer Henry Royce created the world famous Rolls-Royce car.
                                               Inventors and Their Inventions
   Our lives are made easier, longer, warmer and speedier by  (46)  . A few inventions were named after their inventors. Here are some:
Inventors          Inventions
John Bowler        the  (47)  hat bowler
Louis Braille      his own  (48)  .
Rudolf Diesel      an engine that began a transport revolution—  (49)  .
Charles Rolls      the world-famous car—  (50)  car

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答案diesel engine
解析 从对Rudolf Diesel的介绍中可知：他的主要贡献就是发明了柴油发动机，推进了交通运输革命。
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