5个元音的字母音 a [ei] e [i:] i [ai] o [u] u [u:]
5个元音的短元音:
a [e] bag cat hat map
e [e] pen bed ten hen
I [i] big pig sit hill
o [] box hot dog frog
u [u] but mum bus mug
12个单元音:
短元音[e] [e] [i] [] [] [u] []
长元音 [i:] [:] [a:] [u:] [:]
8个双元音:[ei] [ai] [u] [au] [i] [i] [e] [u]