作者认为格林当时关心利比里亚的奴役劳工状况，其在《没有地图的旅途》有一段秘密任务就是作为反奴隶制社会的耳目。

The author believes that Greene's concealed agenda in "Journey Without Maps" was to act as eyes and ears for the Anti-Slavery Society, concerned at that time about slave Labour conditions in Liberia.

youdao

但他生活在生产力水平低下，科学技术不发达的奴隶制社会，这就决定了他的农业思想带有一定的地域和历史的局限性。

But he lived in the low level of productivity, science and technology developed slave society, which determines his agricultural ideas with a certain geographical and historical limitations.

youdao

巨大的社会变革——奴隶制的结束，妇女和民权运动的开展，殖民制度的结束，环保主义的诞生——都因为公民意识觉醒和公民的参与才开始的。

Great social transformations—the end of slavery, the women's and civil rights movements, the end of colonial rule, the birth of environmentalism—all began with public awareness and engagement.

youdao

Objection number two, it's not really slavery to tax because at least in a democratic society it's not a slave holder.

第二条反对意见，征税算不上是奴隶制,因为至少在民主社会,不存在奴隶主。

耶鲁公开课 - 公正课程节选

Only in the Roman Empire could slavery actually start being a way that you can move up in society, because you could-- if you were a talented slave, your owner might free you, probably would free you.

只有在罗马帝国，奴隶制可以成为,提高社会地位的手段，因为。。。,如果是一个能干的奴隶，主人可能会释放他，很有可能。

耶鲁公开课 - 新约课程节选

For the first time"--this was, of course, the French aristocrat de Tocqueville "For the first time we have had the chance to examine the effect that slavery produces on a society.

第一次",这位托克维尔即是,法国的那位贵族德·托克维尔,"第一次我们有机会仔细观察,奴隶制对一个社会造成的影响

耶鲁公开课 - 美国内战与重建课程节选