遏制了奴隶制种植园向西扩展的翻译：Containment of slavery plantation to the West extension 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

Curb slavery plantations westward expansion

Containment of slavery plantation to the West extension

Contained the slavery plantation to expand to the west

Plantation slavery was curb westward expansion

Containment of slavery plantation to the West extension