In the largest airborne survey of Earth's polar ice, the airplanes of Operation IceBridge carry an array of instruments to measure the ice from top to bottom.
在对地球极地冰川进行的最大的一次空中调查中，执行“冰桥行动”的飞机携带了很多仪器从头到脚对冰川进行了测量。
The powerful icebreaker took part in the rescue operation to save the Italian polar expedition led by Umberto Nobile.
这艘强劲的破冰船参与了安伯托·诺比尔的营救行动。当时他正带领一支意大利北极探险队。
It deals with the operation, calculation principle and steps in the application of transit polar setting-out in highway constructions.
介绍经纬仪极坐标放样法在公路施工应用中的操作方法，计算原理及步骤等。
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