If we try to identify the original causes, the key is that Japan has a high level of contingent teachers.

而探究其本源，归根于日本拥有一支高水平的教师队伍。

youdao

If we try to identify the original causes, the key is that Japan has a high level of contingent teachers.

而探究其本源，归根于日本拥有一支高水平的教师队伍。

youdao