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  3. Seventy years ago a famous professor wrote that a city could be destroyed and re

Seventy years ago a famous professor wrote that a city could be destroyed and re

游客2024-01-02  36
问题 Seventy years ago a famous professor wrote that a city could be destroyed and rebuilt, but farmland once lost was lost for good. California figures that for every ten people increase in population, an acre of good arable land is lost from agriculture.
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答案 70年前一位著名的教授写道，一个城市毁弃后可以重建，但农田一旦失去就永远失去了。据加利福尼亚州估算，人口每增加十人，农业就要失去一英亩良好的可耕地。
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