The more the bubble close to the free surface, the narrower the bottom jet develops crosswise, and the larger the pressure gradient, the rising velocity and the height of the bottom jet is upwards.

越靠近自由表面，底部射流横向发展越窄，而向上的压力梯度，气泡上升速度，底部射流上升高度越大，反之则反；

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If you're doing really well, try sitting on the bottom of the pool and watch your bubbles rising to the surface. Or even harder, lie on your back on the bottom and watch the bubbles.

如果你真的做得很好，试着坐在池底并观察你吐出的气泡泡慢慢升到水面。

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The structure plate is composed of high-elastic structure, which is provided with an edge raised line, a middle raised line, a bottom flat surface and a bottom concave surface.

由高弹性结构构成，高弹性结构上设置有边凸条、中凸 条、底平面、底凹面；

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Most models set up to try to figure out what happened during the Late Cretaceous climate changes conclude that water sank from the surface to the bottom of the ocean around Antarctica or the North Pacific.

FORBES: Could Fish Fossils Help Us Better Predict Climate Change?

The Swedish government is funding research into the feasibility of using a wind-turbine driven oxygen pump in the Baltic, following studies carried out last year by the University of Gothenburg, which looked at the effect of pumping oxygen-rich surface water to the bottom of two Swedish fjords.

CNN: Can oxygen pump breathe life into ocean 'dead zone?'

Here on the Earth's surface we live at the bottom of a gravity well.

BBC: Sticking solar power station where the Sun shines