Some regions will be far worse hit than others because of the altitude of their glaciers, the nature of the terrain and their susceptibility to localised warming.
由于冰川高度,地形特点和对局部气温上升的敏感性有所差异,某些地区可能会受到更为严重的影响。
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Unlike high altitude aircraft, helicopters aren't so vulnerable to being seen by radar, as they fly low and are often hidden by the terrain. The big issue is the sound.