flash rate meaning in English

闪光率
闪频
瞬间超电压强度

However , the cg flash rate in severe convective systems with organized structure is high and has peak value before mature stage
而有组织的强对流系统地闪频数较高，在发展阶段出现地闪频数峰值。
After the weather system getting into mature stage , its cg flash rate begin to decline and its percentage of positive cg lightning begin to go up rapidly meanwhile . sometimes all the cg flashes produced at dissipating stage are of positive polarity
在系统进入成熟阶段后，地闪频数开始下降，而正地闪所占比例显著增加，在系统消散阶段甚至会出现短时间内全为正地闪的现象。
The result follows : ( 1 ) cg lightning in common thunderstorm with weak convective intensity is active at the developing and mature stages , the negative flash rate begins to decline gradually afterwards . the cg flashes in all lifetime are almost of negative polarity and very rarely positive polarity
分析结果表明：对流强度弱的普通雷暴在发展阶段和成熟阶段地闪比较活跃，在成熟之前出现地闪频数的峰值，随后地闪频数逐渐减小，整个生命史中几乎全为负地闪，极少出现正地闪。