柯林斯词典rainfall /ˈreɪnˌfɔːl/ 1. N-UNCOUNT Rainfall is the amount of rain that falls in a place during a particular period. 降雨量 There have been four years of below average rainfall. 已經有4年降雨量低於平均水平了。 返回 rainfall剑桥词典rain , or the amount of rain that falls 下雨，降雨；（降）雨量 Heavy rainfall ruined the match . 大雨讓這場比賽泡了湯。 The average annual rainfall in this region is 750 mm. 該地區年平均降雨量爲750毫米。 返回 rainfall