并随即变为绕轴心向上的涡流，龙卷中的风总是气旋性的，其中心的气压可以比周围气压低百分之十。

And then up into the swirl around the axis, the wind always Tornado of the cyclone, its central pressure than the surrounding air pressure low 10 percent.

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来自美国的新研究发现严重的头痛比如偏头痛和季节有联系，特别是周围环境温度增加和较小程度气压降低的情况下。

New research from the US found that severe headaches such as migraine were linked to changes in weather, particularly to increased ambient temperature and to a lesser extent lower barometric pressure.

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解释说，他们周围空气罐压反对一切，同样按下在水面上，迫使空气压力上升了水的瓶子颈部当大气。

Explain that the air around them presses against everything and likewise presses down on the water in the jar, forcing the water up the neck of the bottle when atmospheric air pressure rises.

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