And most black children came from poor, ill-educated families where English, the main language of instruction, was not their mother tongue.

而且黑人孩子大都来自文化程度很低的贫困家庭，他们的母语不是教学中所使用的英语。

youdao

And most black children came from poor, ill-educated families where English, the main language of instruction, was not their mother tongue.

而且黑人孩子大都来自文化程度很低的贫困家庭，他们的母语不是教学中所使用的英语。

youdao