Thank you very much!
My another problem is that I have two dictionaries: LONGMAN Dictionary of Contemporary English (2005) and COLLINS COBUILD Essential English Dictionary (1988). The LONGMAN provides the British pronunciation while COLLINS COBUILD declared that it uses the Received Pronunciation, but I have found there some differences between the dictionaries in the pronunciations of the following words (the differences has been blued):
bed: bed/(LONGMAN); /bεd/(COLLINS)
actual: /æktSuəl/(LONGMAN); /æktS�əl/(COLLINS)
hair: /heə/(LONGMAN); /hεə/(COLLINS)
peculiar: /pIkju:liə/(LONGMAN); / pIkju:lIə/(COLLINS)
Is the British pronunciation different from the RP? If yes, then the different authorities provide different standards of pronunciation (here it means the ones provided by dictionaries) in U.K.? If not, then where do the differences come from? And why are there different standards? Or the pronunciation has changed over the past years?
Thank you very much!