首先他大胆地展示黑人民族的真实存在：他们有着不可否认的种族身份，有着值得颂扬的美，也有着不容回避的弱点。

First, he exposes in a bold way the real existence of American black people, including their undeniable racial identity, praise-worthy beauty and unescapable defects.

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它也教导年轻人对他们的种族身份。

It also teaches the young about their ethnic identity.

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只有最北部的群落将他们的语言和种族身份保留到了20世纪。

Only the most northerly group has retained their language and ethnic identity into the 20th century.

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