He wanted to build institutions that would be used for the sole purpose of perfecting the slave into the perfect worker.

因而需要建立一些特殊机构,这些机构只用于一个目的,就是能够让奴隶变成完美的工人

耶鲁公开课 - 美国内战与重建课程节选

In American law, you cannot terminate an employee, for the sole purpose of age.

美国法律规定，如果你仅因为年龄原因辞退员工，

退休很神奇 - SpeakingMax英语口语达人