I'm confused about pronounciation of æ. If we look at the following words on these pages, they have the same æ symbol in IPA (transcription). I don't understand why they sound different. Could somebody explain in simple terms why it happens and how to memorize words if transcriptions sound different. Consider as exceptions?
Have - /hæv/ (strong form) https://www.oxfordlearnersdictionaries.com/definition/english/have_1
Examine - /ɪɡˈzæmɪn/ https://www.oxfordlearnersdictionaries.com/definition/english/examine
Initially I was very motivated to learn all English sounds using the BBC pronounciation series, but I often encounter difference for æ in dictionaries and it causes confusion and a little bit of frustration. I know that I should continue, but I have a wish to do things correctly and without mistakes to go further.
https://www.youtube.com/watch?v=qVhaIHk88a8&list=PLD6B222E02447DC07&index=7