The non-tone quality phoneme is an important and difficult point in he teaching and coaching of Putonghua.

非音质音位的教学与辅导是普通话教学中的一个重点和难点。

youdao

The non-tone quality phoneme is an important and difficult point in he teaching and coaching of Putonghua.

非音质音位的教学与辅导是普通话教学中的一个重点和难点。

youdao