在低气压系统中，气压值最低点。 著名的低气压中心就是亚洲低压中心（印度低压）。
我们那时在低压中心的西南方向，开始逐渐偏向东方。
We were then south-west of its centre and started moving east in gentle style.
所分析的地面低压中心位于中（尺度）气旋之东约8公里处。
The analyzed low-pressure center at the surface was located ~8 km east of the mesocyclone.
一种是气旋，在低压中心的四周形成旋转的螺旋气流时就出现了气旋。
One is the cyclone this happens when the windsform a circulating spiral around the low.
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