2023上半年英语四级听力美文第53篇:The Origin of the Refrigerato

2023-03-14 08:37:00来源:网络

  》》》》2023年6月英语四级听力美文100篇

  在英语四级考试中,听力是提分最快的模块,听力练习得找对方法,对症下药才会有效,一起来看看“2023上半年英语四级听力美文第53篇:The Origin of the Refrigerato”,大家可根据自己需求加强练习。

  2023上半年英语四级听力美文第53篇:The Origin of the Refrigerato

  By the mid—nineteenth century, the term icebox had entered the American language, but icewas still only beginning to affect the diet of ordinary citizens in the United States. The ice tradegrew with the growth of cities. Ice was used in hotels, taverns, and hospitals, and by someforward—looking city dealers in fresh meat, fresh fish, and butter. After the Civil War (1861-1865), as ice was used to refrigerate freight cars, it also came into household use. Even before 1880 half of the ice sold in New York, Philadelphia, and Baltimore, and one—third of that sold inBoston and Chicago, went to families for their own use. This had become possible because anew household convenience, the icebox, a precursor of the modern refrigerator, had beeninvented. Making an efficient icebox was not as easy as we might now suppose. In the earlynineteenth century, the knowledge of the physics of heat, which was essential to a science ofrefrigeration, was rudimentary. The commonsense notion that the best icebox was one thatprevented the ice from melting was of course mistaken, for it was the melting of the ice thatperformed the cooling. Nevertheless, early efforts to economize ice included wrapping up theice in blankets, which kept the ice from doing its job. Not until near the end of the nineteenthcentury did inventors achieve the delicate balance of insulation and circulation needed for anefficient icebox. But as early as 1803, an ingenious Maryland farmer, Thomas Moore, hadbeen on the right track. When he used an icebox of his own design to transport his butter tomarket, his butter, still fresh and hard in neat, was worth one—pound a brick. One advantageof his icebox, Moore explained, was that farmers would no longer have to travel to market atnight in order to keep their produce cool.

  以上是新东方在线英语四级频道小编为大家带来的“2023上半年英语四级听力美文第53篇:The Origin of the Refrigerato”,只要大家坚持每天练习,培养语感,相信考生们都能取得出色的成绩。


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