Tang Guo-Ying, Sun Zhu-Ling, Jiang Ru-Bin, Li Feng-Quan, Liu Ming-Yuan, Liu Kun, Qie Xiu-Shu. Characteristics and mechanism of a triggered lightning with two polarity reversals of charges transferred to groundJ. Acta Physica Sinica, 2020, 69(18): 189201. DOI: 10.7498/aps.69.20200374