双语例句原声例句
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他们是在罗马侵略前建立的， 那时人口急剧增长，农场主急需保护， 无论是最初的个人保护还是后来的群体保护。
They were built in the centuries before the Roman invasions, when population pressure was most intense and farmers had growing need of protection, first from the elements, but later from each other.
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超过退休年龄的人口的比例在过去几年中已急剧增长。
The proportion of the population who are over retirement age has grown tremendously in the past few years.
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自然界规定了谁的储量是固定的，与此同时，伴随着世界人口的的急剧增加，水的需求量也就不可避免的迅猛增长。
Nature has decreed that the supply of water is fixed. Meanwhile demand rises inexorably as the world's population increases and enriches itself.
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Then what happens is the population grows, and for this the archaeological evidence is very strong.
然后你会发现人口在急剧的增长,有很多考古证据都可以有力的证实这一点
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