发音舌抵下齿逐渐上卷双唇张开单词hear near yearhero zero theorybeer career peerhere mere severecashier fierce tier appear beard clearperiod material seriousbacteria cereal coherenceengineer volunteer atmosphere句子The hero likes beer.We can hear it clearly.The cereal tastes good.He works as an engineer.Next year will be a new era.同音[ɪə]cereal serialdear deerhear herepeer pier
