最早的人类聚落，都是以“逐水草而居”来选择居住地。
The earliest human always choose the place which around water and grass to live.
从前他们世世代代过着游牧生活，逐水草而居，根据季节的变化一年要搬迁三四次。
They had to move three to four times every year by the change of seasons, settling down along those places with adequate grass and water.
历史上，恶劣的自然环境和逐水草而居的特有的游牧生活方式，一定程度上造成了中东人民边界领土观念的淡漠。
Historically, the bad natural environment and the unique nomadic lifestyle of living by water and grass partly led to people's indifferent concept of Territories and Boundaries in the Middle East.
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