The gravitational field from Yingkou to Kuandian gradually increases in total from north to south, but in the central area, lower gravitational field alternating with higher field in belt.

营口—宽甸地区重力场自北而南有逐渐增高的总趋势。中部区重力低与重力高呈带状相间出现。

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On top of that, the field generated by an alternating current interacts with the ground more strongly than it does with the air.

高空架线的话，由交流电产生的电磁场与地面的感应要比空中的电场交互作用强大得多。

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In this step, the packing of colloidal particles could be controlled by shaking the drops in a slowly alternating electric field.

在这个步骤中，胶体粒子的堆积可以通过在一个交替的静电场中震动液滴来完成。

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In the meantime, Rangers carried on through alternating periods of on-field failure and success.

BBC: Sir David Murray and the fall of Rangers Football Club

Although they have not been found to cause any harm, the cables on conventional pylons, which transmit a three-phase alternating current, generate a strong electric field and a continuous buzz of low-frequency radio waves.

ECONOMIST: Monitor