我断言这条曲线，界定了另一个可定向的曲面。
Well, I claim this curve actually bounds another surface that is orientable.
大遗址可界定为具有重要价值的大面积文化遗存。
The value of the great site is decomposed cultural value and economical value.
大遗址可界定为具有重要价值的大面积文化遗存。
The value of the great site is decomposed cultural value and economical value.
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