19世纪的许多富人是奴隶主，他们靠剥削奴隶的劳动积累财富。

Many wealthy people in the 19th century were ___slave-owners who accumulated fortunes by exploiting the labor of enslaved people.

员工们称这家血汗工厂的老板是现代奴隶主，因为他们强迫工人每天工作16小时。

Workers call the sweatshop bosses modern ___slave-owners for forcing 16-hour workdays.