They'resometimesthewillofdooronestimating, but I thinkitisasimportantascorrectpronunciationbecausetheintonationandrhythmofflanguagechangedhowwordstopronounceandaccentuated, andthebestwaytolearnintonationandrhythmisshadowing.
When I wasinBelgium, I didshadowingatleastonehour a day, andas a result, myEnglishpronunciationchangeddrastically.
Andas a learningmaterial, I wouldrecommendTedtalkbecausetheyhave a lotofinterestingvideoswithEnglishsubtitleswhichwewillbakeyourshadowingmuchmorefunthaneasier.
Sothisisprettymuchwhat I didtoimprovemypronunciation.
Theremightbebetterwaytoimproveyourpronunciationandam I not?