It may or may not be connected to earth ground.

实际上它可能连接也可能未连接到底。

youdao

The common ground may or may not be wired to earth ground.

共地端可能与大地相连也可能未连接。

youdao

Shields are often "grounded," that is, they are connected to an earth ground point.

屏蔽通常是“接地”的，也就是说，它们被连接到一个接地点。

youdao

The short wave signals bounce off the ionosphere that surrounds the Earth,back to the ground and then back to the ionosphere.

VOA: special.2010.12.08

It's dangerous to want to get away from earth awhile, to get your feet entirely off the ground.

想要逃离地面一会，让自己的双脚同时离开地面很危险。

耶鲁公开课 - 现代诗歌课程节选

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

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