To learn spoken language and written language. they need special training. So, the mainstreaming language is their second language.

相对而言，他们掌握口语和书面语都要经过专门的康复训练，因此，主流语言对他们来说属于“第二语言”。

youdao

To learn spoken language and written language. they need special training. So, the mainstreaming language is their second language.

相对而言，他们掌握口语和书面语都要经过专门的康复训练，因此，主流语言对他们来说属于“第二语言”。

youdao