那位奴隶主拥有几十名奴隶在棉田里工作。

The ___slave owner had dozens of slaves working in the cotton fields.

这家血汗工厂的老板简直就像个奴隶主，压榨工人微薄的工资。

The boss of this sweatshop acts like a ___slaveowner, exploiting workers with meager wages.