久久亚洲国产成人影院-久久亚洲国产的中文-久久亚洲国产高清-久久亚洲国产精品-亚洲图片偷拍自拍-亚洲图色视频

您現在的位置: > Language Tips > Easy English > Odd Question  
 





 
微波爐是怎么來的?
[ 2006-09-06 10:37 ]

微波爐實在是個方便好用的工具,尤其是對上班族來說,做飯變成了簡單又快捷的事。但你可能不知道,微波最初的研究是應用在軍事領域中的,直到有一天,科學家發現他口袋中的巧克力被微波的熱量熔化了……

In 1946, Dr. Percy Spencer, an engineer for the Raytheon Company, pulled the idea for the microwave oven right out of his pocket.

An invention of Raytheon Company scientists Sir John Randall and Dr. H.A. Boot, the magnetron, provided Dr. Spencer with both the most critical component of the microwave oven, and created the accident that led to its discovery.

The magnetron the two Birmingham University scientists were charged with inventing during World War II provided the Allies with the means to pinpoint the exact locations of Nazi war machines and arsenals, as the magnetron produced microwaves which radar then bounced off of these weapons of destruction, and back to the Allies.

Testing using the magnetron continued in the post-war years, and Dr. Spencer, in the midst of performing one of these tests, made a logical connection, which gave birth to the microwave oven. While performing such a test, Doc Spencer had a hankering for the chocolate bar he had stashed in his pocket. He eagerly reached into his pocket, only to discover chocolate sauce. Percy reasoned that the culprit responsible for the melted mass of chocolate was not his body heat, but his proximity to the heat-producing magnetron.

In true scientific fashion, Dr. Spencer decided to put his theory to the test, and sent for a bag of corn. He placed the corn in front of the magnetron tube and watched as the kernels popped into the air, and rained down upon the floor. Still dissatisfied with the amount of data he had collected, the good doctor decided to perform one more test to solidify his theory. To add more drama to his next act, he chose to cook an egg, which, when placed in front of the magnetron tube, summarily blew up in the face of an on-looking colleague.

Raytheon deemed these data conclusive, and launched an effort to produce the first microwave oven. The mammoth microwave oven they created bore the name Radar Range, in honor of the magnetron's service to this country during wartime. Sales of the large appliance in the 1940s were virtually nil, with the exception of sales to the military and to restaurants.

In 1952, Tappan introduced a home use model, selling at a mere $1,295.00, and sales of microwaves increased. Today, the compact versions of the original Radar Range, carrying much lower price tags, are standard in most homes, and almost everyone can afford to enjoy microwave popcorn from a bag, not from off of the floor!

magnetron 磁電管

pinpoint 精確、查明

hankering 渴望

(英語點津 Annabel 編輯)

 
 

 

 

 
 

48小時內最熱門

     

本頻道最新推薦

     
  Labor Day(美國勞動節)
  Why did the tree see the dentist?
  August 24
  A mistake(通訊員供稿)
  August 23






主站蜘蛛池模板: 成人欧美一区在线视频在线观看 | 91香蕉国产在线观看免费永久 | 亚洲精品久久99久久一区 | 久久中文字幕乱码免费 | 欧美日韩一区二区三区免费不卡 | 美女扒开双腿让男人桶 | 九色porny真实丨国产18 | 亚洲 欧美 视频 | 福利视频99 | 在线观看亚洲 | 成人免费高清视频 | 日本精品一区二区三区在线视频 | a级高清| 手机看片免费基地 | 日本一级毛片免费播放 | 日韩亚洲欧美一区噜噜噜 | 亚洲视频在线免费播放 | 中文字幕人成不卡一区 | 92精品国产自产在线观看 | 久久久久欧美精品观看 | 性欧美videofree中文字幕 | 久久草在线| 国产短裙黑色丝袜在线观看下 | 免费看美女毛片 | 亚洲成人精品久久 | 免费黄网在线观看 | hd最新国产人妖ts视频 | 天空在线观看免费完整 | 欧美色爱综合 | 亚洲精品一区二区三区在 | 国产成人经典三级在线观看 | 91精品国产91久久久久久 | 日本又黄又爽又免费 | 男女男精品视频免费观看 | 毛片免费观看成人 | 亚洲va在线va天堂va四虎 | 亚洲a在线播放 | 亚洲成a人片在线观看 欧美 | 久久免费精彩视频 | 久久久视 | 一级做a爰片久久毛片看看 一级做a爰片久久毛片鸭王 |