相对于绝大多数物种的存在方式而言，人类生活在一个很小的狭长地带，那里几乎没有剩余食物，因此可以以相对平等的方式生存。

For most of the species's existence, humans lived in small foraging bands that had little material surplus and therefore enjoyed a relatively egalitarian existence.

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可是，黑色外表为各种复杂形式的物种所有，它们栖息在不同地带、有白天活动的也有黑夜活动的、有在地面生存的也有在树上生存的。

Melanic forms, though, are particularly prevalent in species with complicated lives—those that inhabit a range of habitats, are active both day and night, and move between the ground and the trees.

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乌鲁奇帕亚人以生活在盐土荒漠的边缘地带而著称。 盐土荒漠的生存条件残酷而可怕，即使是古印加人也望而却步，但乌鲁奇帕亚人却依靠河水灌溉土地而生存。

The tribe is renowned for surviving on the fringe of a salt desert, a harsh and eerie landscape which even the Incas avoided, by flushing the soil with river water.

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This tension of course between the best regime and any actual regime is the space that makes political philosophy possible.

张力当然存在于最优政体与现行政体之间,而那正是政治哲学,得以生存的地带。

耶鲁公开课 - 政治哲学导论课程节选