不同历史阶段的人与自然之间的矛盾是人类社会历史的现实体现。

The contradiction between human being and nature in the different historical period is the real reflection in the history of the human society.

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海洋文化是人类社会历史实践过程中受海洋影响所创造的物质财富和精神财富的总和。

The marine culture is a summation of the material wealth and spiritual wealth created by mankind influenced by ocean in the historic course of social practice.

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由多巴胺带来的对快乐的感受，在一定程度上解释了为什么音乐在人类社会历史上占据如此重要的地位。

Dopamine-induced pleasure may help explain why music has been such a big part of human societies throughout history.

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And by the 1820s and 1830s the American South became what I think you could safely say was the fifth slave society in human history; maybe the sixth. This is debatable.

自十九世纪二三十年代起,美国南方,绝对成为了,人类历史上的第五个奴隶社会,也可能是第六个,这仍然处于争议中

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