the second-order derivative of potential
the second-order derivative of potential
势的二阶导数
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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Gravity gradient is the second order derivative of gravitational potential, which can be observed by satellite gradiometer.
重力梯度为重力位的二阶导数，可以通过星载梯度仪进行观测。
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