Was introduced to vs has been introduced to

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was introduced to is the most popular phrase on the web. 

has been introduced to

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was introduced to

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Some examples and use cases from the internet:

Some examples and use cases from the internet:

  • The structural fund has been introduced to enable the EU's poorer regions to adapt.
  • The first stage is the localized infection of the bite and the bacteria that has been introduced to the person's system.
  • An amendment to the Parliament's legislative resolution has been introduced to this effect.
  • A standard amendment to the legislative resolution has been introduced to this effect.
  • EDB Diff for Exchange Server is a new tool that has been introduced to the MailRecovery Server suite in 2010. Given two Exchange databases it will produce two sets of messages representing the differences between the databases.
  • The particle selectivity can be determined between 0.5 to 200 micrometer PURIC new activated carbon cartridge has been introduced to provide stackable carbon cartridge with a substantially increased carbon content.
  • On (e): The definition of «security holder» has been introduced to clarify who is responsible for notifying changes to major shareholdings with security issuers, but also to clarify rights of equal treatment in the context of general meetings.
  • A new sealed jar has been introduced to insure the integrity of Resinol.
  • A sliding or rolling bed was introduced to allow the form to be withdrawn and reinked after each sheet was printed.
  • About 2 months ago I was introduced to Lucio, the Director of this web site, by a mutual cyberspace friend.
  • The notion of patriarchy was introduced to distinguish sexist forces from other social powers, like capital.
  • Tuberose is a nocturnal plant believed to have originated in the fertile soils of Mexico, which later on was introduced to the different countries growing them today.
  • The very first Toyota Corolla made was introduced to the motoring public in October of the year 1966.
  • The ban on parallel sales was introduced to avoid compensatory deals that might undermine the undertaking.
  • This legislation was introduced to help consumers make informed choices, protect the industry and enhance the operation of the internal market.
  • The DOS SHELL is completely new. QBASIC was introduced to replace BASICA and GWBASIC.

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