十九世纪前半叶，情况改变，他们开始称呼自己有色美国人，小部分人自称尼格罗人和黑人。

By the first half of the 19th century, a change took place, and they started calling themselves Colored Americans and, to a lesser extent, Negroes and Blacks.

youdao

十九世纪前半叶，情况改变，他们开始称呼自己有色美国人，小部分人自称尼格罗人和黑人。

By the first half of the 19th century, a change took place, and they started calling themselves Colored Americans and, to a lesser extent, Negroes and Blacks.

youdao