to ground

基本解释

Being able to get precise, timely information from a satellite (or “bird”) in this way is of great military value, and not just to ground troops.
照此方式，可从一颗卫星（或“飞行器”）那获取精确及时的信息，这种本事军事价值极大，并不仅仅用于地面部队。
The MUOS system will provide cell phone-like services to ground-based warfighters around the globe, with the satellites acting as "cell towers" in space.
MUOS系统将向分布于全球的地基战斗单位提供类似蜂窝电话的服务，卫星在太空中起蜂窝发射塔的作用。
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Then he turned around and went back to Ground Zero.
之后他转过身来，重又走回到倒塌现场。

And,this will force the agency to ground flights carrying aid workers to camps for refugees and internally displaced people.
Then he flung outward, feet first, with a swish, Kicking his way down through the air to the ground.
然后，纵身一跳，他两脚先伸出去，在空中乱踢乱舞，于是飕的一声，降落到地面。
耶鲁公开课 - 现代诗歌课程节选
so I don't know, I think it's just really cool to be able to work something from the ground up.
所以，我不知道，我就是觉得能从头开始做一件事很酷。
什么是认知科学？ - SpeakingMax英语口语达人

For affected units, the Air Force says it will shift its focus to ground training.
NPR: Federal Budget Cuts Ground Air Force Aircraft