Antiwar people told them that the civil war was not about saving the unity of the federation, but about liberating black slaves.

反战人士对他们说，这场内战不是为了挽救联邦的统一，而是为了解放黑人奴隶。

youdao

That freedom is achieved on the backs of the black slaves.

这种自由是建立在对黑奴的压迫之上的。

youdao

It's about a time when there were black slaves in North America.

那是一个美国北部还存在黑奴的时代。

youdao

Finally,Abraham Lincoln freed the black slaves in the rebel southern states during the Civil War.

VOA: special.2009.07.24

They said former black slaves in the south had gained a lot under Republican rule.

VOA: special.2010.03.11

Should there be a war,he said, the North would break the chains of black slaves.

VOA: special.2009.06.25

The liberator of black slaves is portrayed in her late 20s, young, but weary, sitting on a bench carved into a boulder.

NPR: Artist William Pajaud's Jazzy New Orleans, Part 2

Much as I applaud the work of the British abolitionists I do not give them most of the credit for the freedom of black slaves.

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Its moment of glory came in 1804, when its former slaves founded the first independent black republic.

ECONOMIST: Rebuilding Haiti