国外网站网站目录　/　此网站目录下共收录5290个优秀网站

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  Sciencenews

  Weekly magazine offers featured articles from the current issue along with special online-only features. Includes photo collection, archives, email newsletter and Science News for Kids section.

  http://Sciencenews.org/
  百度权重：
  PageRank：
  AlexaRank：0
  收录时间：2025-08-16
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  Rand

  Seminal information about health care in the USA and its financing. The Rand organisation is concerned with a wide range of Health Economics Research.

  http://Rand.org/
  百度权重：
  PageRank：
  AlexaRank：0
  收录时间：2025-08-16
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  Amnh

  Institution for scientific research and education, with collections of more than 32 million specimens and artifacts. Includes a visitor's guide, collection details, programs, online ticket sales, hours, and directions to the location in New York City.

  http://Amnh.org/
  百度权重：
  PageRank：
  AlexaRank：0
  收录时间：2025-08-16
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  Bps.go

  The official site of BPS - Biro Pusat Statistik with some economic indicators.

  http://Bps.go.id/
  百度权重：
  PageRank：
  AlexaRank：0
  收录时间：2025-08-16
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  Thecalculatorsite

  Includes online conversion and calculation tools. Possible to change the precision of the result.t.

  http://Thecalculatorsite.com/
  百度权重：
  PageRank：
  AlexaRank：0
  收录时间：2025-08-18
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  Openssl

  A toolkit implementing SSL v2/v3 and TLS protocols with full-strength cryptography world-wide. It is based on SSLeay, developed by Eric Young and Tim Hudson. [Free / Open Source] (The OpenSSL Project)

  http://Openssl.org/
  百度权重：
  PageRank：
  AlexaRank：0
  收录时间：2025-08-17
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  Ucar

  UCAR strives to advance the understanding of weather and climate in order to benefit society.

  http://Ucar.edu/
  百度权重：
  PageRank：
  AlexaRank：0
  收录时间：2025-08-18
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  Istat

  Istituto Nazionale di Statistica, with some economic and social data in English, and more detailed information in Italian. Describes services and products available, as well as research projects and internal quality controls.

  http://Istat.it/
  百度权重：
  PageRank：
  AlexaRank：0
  收录时间：2025-08-17
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  Chemguide

  Resource for A Level chemistry students.

  http://Chemguide.co.uk/
  百度权重：
  PageRank：
  AlexaRank：0
  收录时间：2025-08-18
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  Mathgoodies

  Math Goodies is a free math help site that launched in 1998. Math Goodies was a pioneer of interactive math instruction and free math homework help. Today this award-winning site has over 500 pages of activities for students, educators and parents.

  http://Mathgoodies.com/
  百度权重：
  PageRank：
  AlexaRank：0
  收录时间：2025-08-18