介绍:
15) [au] 字母组合 ou ow house out flour ground account count sound loud around mouse flower down now cow how town 16) [əu] 发音字母 o ow oa home cold go no phone host ghost know low below grow blow show flow boat coat goal 17）[ɔɪ] 字母组合oy oi boy toy joy oil soil voice choice 18）[iə] 字母组合 eer ea, ear,ea, ear, er, ier beer deer ear idea near here fierce 19) [eə] 字母组合ear air pair bear chair air fair care there where 20) [uə] tour poor
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