This is an approximate translation in the International phonetic alphabet. Hope it'll be helpful !
d'envoi : /dã-vwɑ/
événement : /e-vɛn-mã/
athlète : /a-tlɛt/
entraînent : /ã-tʀɛn/
pays : /pe-i/
this is where you can find help to understand it :
http://en.wikipedia.org/wiki/International_Phonetic_Alphabet
and in French : http://fr.wikipedia.org/wiki/Alphabet_phon%C3%A9tique_international
/e/ is almost like "sleigh", in French : "Les", "mangé"
/ɛ/ like in English "laid" or in French : "Marseilles",
/ã/ typically nasal sound you can find in French "an", "lent", parent", "content"
Note : La tour Eiffel : /lɑ tuʀ efɛl/