华北地区春季降水
spring precipitation in North China
华北地区旱涝
Drought and flood in North China
华北地区降水
rainfall over North China
华北地区夏季降水指数(RI)
RI index describing the summer precipitation in North China
华北地区夏季降水指数RI
RI index describing the summer precipitation in No
西北华北地区
Northern and northwestern regions
华北、东北地区
North China and Northeast China region
南华北叠合盆地
southern North China superimposed basin