As in a free labor system and unlike slavery, the overlords had no responsibility for the serf's maintenance and no direct interest in his or her survival as an expensive piece of property.

与自由的劳动力体制一样但与奴隶制不同，农奴主对于农奴的生存没有任何责任，对于这样一件昂贵的财产的死活也没有直接的兴趣。

youdao

Slavery is the system by which some people are owned by others as slaves.

当今美国的黑人拥有平等权在某种程度上也是他们的成就。

youdao

One headstone says that Lincoln believed the system of slavery was founded on both injustice and bad policy.

VOA: special.2009.07.24

Some would get worried and they would discuss slavery as a necessary evil this system entailed upon them.

有些人感到忧虑,他们认为传承下来的奴隶制,毫无疑问是种罪恶

耶鲁公开课 - 美国内战与重建课程节选

They wanted to continue their economic system based on agriculture and slavery.

VOA: special.2011.04.09

Stalin established a hideous system of slavery inside his empire--the Gulag Archipelago, a series of concentration camps of barbarism and death that defy comprehension.

FORBES: Fact and Comment

Saudi diplomats will ensure that their fundamentally racist system of domestic slavery is not brought up.

FORBES: League of Human Rights Defenders

But that so-called empire arguably was the global rules-based system, committed to abolishing slavery and to free trade and free movement on the seas.

WSJ: The Weekend Interview with Charles Hill: The Empire Strikes Back