so long英 [səʊ lɒŋ]美 [soʊ lɔːŋ]再见!英英释义nouna farewell remarkthey said their good-byesSynonym:adieuadiosarrivederciauf wiedersehenau revoirbyebye-byecheeriogood-bygoodbygood-byegoodbyegood daysayonara双语例句