A deep area of potential instability existing on the south of front, intense convective motion and heavy rainfall will be aroused in the case of uplift.

锋面南方存在深厚的位势不稳定区域，一旦有抬升运动产生，便很容易激发出强烈的对流运动，从而产生强降水。

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The tropopause folding, which means that high PV spreads downward from the upper troposphere or stratosphere, helps the releasing of potential instability energy and the development of rainstorm.

对流层高层或平流层低层高位涡的下传有利于位势不稳定能量的释放，使得暴雨增幅。

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Potential instability is a great danger.

不安定隐患可能带来极大危险。

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Mr Connor says he and his co-authors believe this is another serious source of potential instability.

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