Seven hierarchical exercises were designed to improve aural phonetic reception in these children.

七个层次练习是为了改善这些孩子的听觉语音接收能力。

youdao

Seven hierarchical exercises were designed to improve aural phonetic reception in these children.

七个层次练习是为了改善这些孩子的听觉语音接收能力。

youdao