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efficiency noun

  /ɪˈfɪʃn̩si/
  • The extent to which time is well used for the intended task.
 эффекти́вность
  • The extent to which a resource is used for the intended purpose; the ratio of useful work to energy expended.
 эффекти́вность, эффективность

efficient adjective

  /əˈfɪʃənt/ , /ɪˈfɪʃənt/
  • making good, thorough, or careful use of resources; not consuming extra. Especially, making good use of time or energy
 эффекти́вный, эффективный

efficiently adverb

  • In an efficient manner.
 эффекти́вно
energy efficiency
энергоотдача
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