Through using actual GPS leveling fitting data in a large-scale area, it introduces the application of optimum function model choice and the related analysis method.

文中通过一个大测区GPS水准实测数据，说明拟合模型优选准则的应用以及具体分析方法。

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In high-end alkali zinc used as an agent, leveling walk agent, can make the high and low area thick thin uniform.

在高档碱锌用作走位剂，整平剂，能使高低区厚薄均匀一致。

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The traditional geometrical leveling is inconvenient in fluctuating area.

在地形起伏较大地区，几何水准测量十分不便。

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That asteroid entered the atmosphere and exploded, leveling trees over an area of 820 square miles -- about two-thirds the size of Rhode Island.

CNN: Russian meteor shower causes blast; hundreds injured

For sky watchers, the reports bring to mind the famous Tunguska event of 1908 in remote Siberia, in which an asteroid entered the atmosphere and exploded, leveling trees over an area of 820 square miles -- about two-thirds the size of Rhode Island.

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In that incident, an asteroid entered the atmosphere and exploded, leveling about 80 million trees over an area of 820 square miles -- about two-thirds the size of Rhode Island -- but leaving no crater.

CNN: Russia starts clean-up after meteor strike