The open air space with convergence at middle and low layers and divergence at high layer was beneficial to maintaining typhoon force as well as heavy precipitation.

结果表明，强大深厚的台风低压系统是降雨的前提条件，中低层辐合、高层辐散的散度场有利于台风势力的维持，对强降水持续起到重要作用；

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The open air space with convergence at middle and low layers and divergence at high layer was beneficial to maintaining typhoon force as well as heavy precipitation.

结果表明，强大深厚的台风低压系统是降雨的前提条件，中低层辐合、高层辐散的散度场有利于台风势力的维持，对强降水持续起到重要作用；

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