If there is no charge on the plate, these droplets will simply fall under gravity.

如果在板子上没有电荷，这些液滴就只会由于重力掉下。

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Particles placed at the top of either slope would fall down to the bottom under the pull of gravity. Particles placed at the bottom of either slope would go nowhere.

在重力的拉动下，放在任何一个斜面顶部的粒子都会滚到底部，而放在底部的粒子会保持不动。

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Sir Isaac Newton supposedly discovered gravity through the fall of an apple.

据称艾萨克·牛顿爵士通过苹果落地，发现了万有引力。

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If there is no charge on the plate, these droplets will simply fall under gravity.

如果在板子上没有电荷，这些液滴就只会由于重力掉下。

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Storms come and go, lake levels rise and fall, but all obey lord gravity.

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We have a cultural picture in our head of Isaac Newton as an upstanding British gentlemen who discovered gravity by having an apple fall on his head.

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"We've gone through those data to see if we can see any influence of gravity on the positions at which they annihilate - looking for atoms to fall for the short amount of time they exist before they hit the wall, " he told BBC News.

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