To calculate the circumference of a circle with an error of 1 mm:
t ə WORD_BOUNDARY k æ l k j ʊ l eɪ t WORD_BOUNDARY ð ə WORD_BOUNDARY s ɜː k ʌ m f ɹ ə n s WORD_BOUNDARY ə v ə WORD_BOUNDARY s ɜː k ə l WORD_BOUNDARY w ɪ ð WORD_BOUNDARY ʌ n WORD_BOUNDARY ɛ ɹ ə ɹ ɹ WORD_BOUNDARY ʌ v WORD_BOUNDARY w ʌ n WORD_BOUNDARY ɛ m ɛ m WORD_BOUNDARY