In this paper, it is pointed out theoretically that the ground surface tilt is not observed by only tiltmeter, but must be determined by both tilt and gravity earth tide data.

本文从理论上阐述了单靠倾斜仪不能监测地面倾斜，必须联合倾斜和重力固体潮资料才能测量地面倾斜。

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Arrows would continue to fly forward forever in a straight line were it not for gravity, which brings them down to earth.

要不是重力使箭掉落地上，它将会一直沿直线往前飞行。

《柯林斯英汉双解大词典》

Otherwise gravity will pull you back down to the Earth.

否则，地心引力会把你拉回地球。

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Newton proved his idea by measuring how much gravity force would be needed to keep the moon orbiting the Earth.

VOA: special.2011.06.01

But gravity has a remarkable property that the pull of the Earth is itself proportional to the inertia of the object.

重力有一个显著特征,即地球的引力,与物体的质量成比例

耶鲁公开课 - 基础物理课程节选

The poet, after all, is subject to gravity in Frost, to the force of the earth.

这个诗人，弗罗斯特，终究还是受制于地心引力，受制于地球的力量。

耶鲁公开课 - 现代诗歌课程节选

But he didn't reckon on the inexorable pull of gravity from Earth's nearest celestial neighbor.

CNN: The sun, the moon and the Titanic

The gravity on the pulsar's surface is 300 billion times as great as the gravity on Earth.

WSJ: Einstein Proved Right on Gravity��Again

And they do this for about three weeks, essentially convincing your body that you live on a planet that has more gravity than Earth.

NPR: Technology Used To Boost Olympic Performance