名词
中文翻译：海拔平行线
同义词：
['altitude line', 'altitude parallel plane', 'altitude parallel axis']
例句：
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1. The mountain range is aligned with the coastline at an altitude parallel to the sea.
山脉与海岸线以一个海拔平行线对齐。
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2.The astronauts used a device to maintain altitude parallel during their space mission.
宇航员们使用一种装置，在太空任务中保持海拔平行。
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3. The aircraft flew along an altitude parallel to the ground, avoiding obstacles.
飞机沿着一条与地面平行的高度飞行，避开障碍物。