第一语言习得是第二语言学习的障碍吗？

Is First Language Acquisition an Obstacle to Second Language Learning?

youdao

第一语言习得是第二语言学习的障碍吗？

On the Relationship between Second Language Acquisition and Language Learning;

youdao

第一语言习得是第二语言学习的障碍吗？

On the Relationship between Second Language Acquisition and Language Learning;

youdao