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descriptor    
描述符,解说符,主字码

描述符,解说符,主字码

descriptor
描述者; 记述子

descriptor
描述符

descriptor
n 1: the phonological or orthographic sound or appearance of a
word that can be used to describe or identify something;
"the inflected forms of a word can be represented by a stem
and a list of inflections to be attached" [synonym: {form},
{word form}, {signifier}, {descriptor}]
2: a piece of stored information that is used to identify an
item in an information storage and retrieval system


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  • Alexander Graham Bell - Wikipedia
    Alexander Graham Bell ( ˈɡreɪ əm ⓘ; born Alexander Bell; March 3, 1847 – August 2, 1922) [4] was a Scottish-born [N 1] Canadian-American inventor, scientist, and engineer who is credited with patenting the first practical telephone He also co-founded the American Telephone and Telegraph Company (AT T) in 1885 [7]
  • Alexander Graham Bell | Biography, Education, Family, Telephone . . .
    Alexander Graham Bell (1847–1922) was a British-American inventor, scientist, and teacher of the deaf whose foremost accomplishments were the invention of the telephone (1876) and refinement of the phonograph (1886)
  • Alexander Graham Bell - Inventions, Telephone Facts - Biography
    Alexander Graham Bell was a Scottish-born scientist and inventor best known for inventing the first working telephone in 1876 and founding the Bell Telephone Company in 1877
  • Alexander Graham Bell: Telephone Inventions | HISTORY
    Alexander Graham Bell, best known for his invention of the telephone, revolutionized communication as we know it His interest in sound technology was deep-rooted and personal, as both his wife
  • Alexander Graham Bell Biography
    Alexander Graham Bell is best known as the inventor of the telephone — the first to transmit the human voice by means of an electric current — but there was much more to this extraordinary man than his breakthrough in communications technology
  • Alexander Graham Bell - The National Inventors Hall of Fame
    After inventing the telephone, Bell continued his experiments in communication, which culminated with the photophone transmission of sound on a beam of light, a precursor of today's optical fiber systems He also worked in medical research and invented techniques for teaching speech to the deaf
  • Biography of Alexander Graham Bell, Inventor - ThoughtCo
    Alexander Graham Bell (March 3, 1847–August 2, 1922) was a Scottish-born American inventor, scientist, and engineer best known for inventing the first practical telephone in 1876, founding the Bell Telephone Company in 1877, and a refinement of Thomas Edison’s phonograph in 1886
  • Life and Major Accomplishments of Alexander Graham Bell
    Alexander Graham Bell, a Scottish-born inventor, patented the first practical telephone Born in 1847 and passing in 1922, he significantly impacted communication technology In 1885, he co-founded AT T, a major telecommunications company
  • Alexander Graham Bell | The Telecommunications History Group, Inc.
    In June, Bell demonstrated the telephone for Sir William Thomson (Baron Kelvin) and Emperor Pedro II of Brazil at the Centennial Exhibition in Philadelphia On July 9, 1877, Bell, Hubbard, Sanders, and Watson formed the Bell Telephone Company, the precursor of the Bell System
  • Alexander Graham Bell - PBS
    Alexander Graham Bell is most well known for inventing the telephone He came to the U S as a teacher of the deaf, and conceived the idea of "electronic speech" while visiting his





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