When possible, try to maintain a single system ground point.

如果可能，应尽量采用单一的系统接地点。

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Under the OSSS contract, Harris provided operations, maintenance and support services to the Air Force Satellite Control network and Global Positioning System ground networks.

根据这份OSSS合同，哈里斯公司为美国空军卫星控制网络和GPS地面网络提供了运行、维护和支持服务。

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They have designed a system which pumps up water from nearly 1,000 feet below ground.

他们设计了一个能从地表以下1000英尺处抽水的系统。

《柯林斯英汉双解大词典》

Between thirty and thirty-five women used each system to pump water from the ground or a stream.

VOA: special.2010.01.11

The Earth seems to be a pretty good inertial system, because on the ground, you leave something, it stays there.

地球看上去是个不错的惯性系,因为什么东西放在地上,都会保持静止

耶鲁公开课 - 基础物理课程节选

Engineers on the ground designed a way the astronauts could connect air-cleaning devices from the command module to the air system in the lunar module.

VOA: special.2009.07.22

British Airways was forced to abandon its plans of moving its entire Heathrow operations to Terminal 5 in just three days in April, after its baggage system ground to a halt, resulting in chaos in the terminal's opening days.

FORBES: Magazine Article

So, for example, having an operational Airborne Laser system and a ground based system give the sea based interceptor more timely and accurate information with which to do its job.

CENTERFORSECURITYPOLICY: 33 Minutes

Whether the U.S. system of ground-based interceptors are the right response quickly became a matter of debate Friday.

WSJ: U.S. to Boost Missile Defenses in Response to North Korea