Choice of precipitation events.

NRDBRE: No-rain days before rainfall events; NRDARE: No-rain days after rainfall events. Like “20.8 (11; 9; 2; 0.6)” in the rainfall event size column means the continuous four rainy days' data observed and we treated as independent rainfall size.NRDBRE：降雨事件前无雨日数（No-rain days before rainfall events）；NRDARE：降雨事件后无雨日数（No-rain days after rainfall events）。例如降雨事件规模列中的"20.8 (11; 9; 2; 0.6)"，代表其对应观测得到的连续4个降雨日数据，且我们将其视作独立的降雨事件规模。