因为地形显露的特性，空中力量在控制这条主要干线方面是至关重要的。
Due to the exposing nature of the terrain, air power is critical in controlling this major artery.
系统而详实了解覆盖地球表面三分之二的海洋水域的化学特性、地形及水流特性代价高昂，但是可以实现的。
Systematic and detailed understanding of the chemistry, topography and flow of the waters that cover two-thirds of the planet would be costly, but it could be achieved.
从上述文字可以看出，在最初阶段，隆美尔亲自收集战区地形信息和沙漠地区特性。
From the above text can be seen in the initial stage, Rommel theater in person to collect information and the desert terrain characteristics of the region.
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