Parameterizations work on parts of the surface.
p æ ɹ ə m ɛ t ə ɹ ɹ aɪ z eɪ ʃ ə n z WORD_BOUNDARY w ɜː k WORD_BOUNDARY ɔ n WORD_BOUNDARY p ɑ ɹ t s WORD_BOUNDARY ʌ v ð ə WORD_BOUNDARY s ɜː f ɪ s WORD_BOUNDARY