Mathematic minimal surface is a surface of minimal area under prescribed boundary condition.
数学上，最小曲面指的是（在给定边界条件下的）面积最小曲面。
The pressure index of cultivated land is the ratio of per capita minimal area of cultivated land and per capita actual area of cultivated land.
耕地压力指数是指最小人均耕地面积与实际人均耕地面积之比。
The pressure index of cultivated land is the ratio of per capita minimal area of cultivated land and per capita actual area of cultivated land.
耕地压力指数是指最小人均耕地面积与实际人均耕地面积之比。
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