This dictionary has been compiled by referring to the Bank of English，aa unique database of the English language with examples of over 323 million words enabling Collins lexicographers to analyse how English is actually used today and how it is changing.This is the evidence onwhich the changes in this dictionary are based.The Bank of Englis was set up as a joint initiative by HarperCollins Publishers and Birmingham University to be a resource for language resarch and lexicography.It contains a very wide range of material from books，newspapers，radio，TV，magaxines.，letters and talks reflecting the whole spectrum of English today.Its size and range make it an unequalled resource and the purpose-built software for its analysis is unique to Collins Dictionaries.This ensures that Collins Dictionaries accurately reflect English as it is used today in a way that is most helpful to the dictionary user as well as including the full range of rarer and historical words and meanings.
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