Of course, it has been extensively studied with ground-based observatories.
当然，它已被广泛研究的地面观测站。
First of all, space is not under a uniform hazard from ground-based weapons.
首先，太空各处受到地基武器的威胁程度并不相同。
Radar tracking of the shuttle, like the final accurate ground-based navigation, had not yet begun.
对航天飞机的雷达追踪，如最后精确的陆基导航，还没有开始。
Holding on the ground is a kind of widespread method based on traffic flux management.
基于交通流量管理的地面等待是空中交通管制中普遍应用的一种方法。
Upon what ground is cognitive narratological research usually based?
认知叙事学展开研究的主要依据是什么?。
A complete data model should be based on these three dimensions: ground, position, and elevation.
一个完全数据模型应该以这三个尺寸为基础：基准、方位和高度。
A complete data model should be based on these three dimensions: ground, position, and elevation.
一个完全数据模型应该以这三个尺寸为基础：基准、方位和高度。
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