If you fall 3 meters, the earth is pulled you down 3 meters, but you have also exerted an equal and opposite force on the earth.

如果你下降3米，就是说地球把你向下拉3米，但你也对地球施加了一个大小相等，方向相反的力。

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now it's the opposite - pseudo Islamic fundamentalism has emerged as a primary political force.

VOA: standard.2010.04.01

There is a repulsive force, the attractive force between ions of opposite charge is offset by a repulsive force due to electron cloud interactions.

有一个斥力时,存在于电性不同的离子间的引力,是可以被抵消的，因为电子可以相互影响。

麻省理工公开课 - 固态化学导论课程节选

Underneath the Velcro-scarred acrylic are two springs that measure force in the opposite direction.

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But the price of financial services will surely not rise: new technology, especially online financial services, is too powerful a force in the opposite direction.

ECONOMIST: Killing Glass-Steagall

So the town of Rantoul, a success story in central Illinois, followed the opposite course: it has replaced its air-force base with 71 different tenants.

ECONOMIST: Shutting military bases