1. 他積極參加政治活動，強烈反對奴隸制度。
   He was active in politics and was strongly against slavery.
2. 我的最高目標是拯救美國，摧毀奴隸制度。
   My paramount object is to save the union and destroy slavery.
3. 美國南北戰(zhàn)爭以前，要廢除奴隸制度是因難的，因為維持這一制度的人有既得利益。
   It was difficult to end the system of slavery before the Civil War because the people who owned the slaves had a vested interest in keeping it.

奴的英語翻譯：

制度的英語翻譯：