rainy-day funds雨天基金
Rainy-Day Fund通俗地称为雨天基金
RAINY OVERCAST DAY阴云密布的雨天
Rainy y day雨天
Build a rainy-day fund建立一只应急基金
on a rainy day在雨天;下雨天;在一个下雨天;在下雨天
on rainy day关于未雨绸缪;在下雨天;未雨绸缪
a cheerless rainy day阴沉的雨天
a Marketing rainy day不如意的日子
The reason for rainfall decreasing in summer season was mainly the decreasing of rainy days, and that for rainfall increasing in winter season was the increasing of rainy days and the daily mean rainfall in rainy day. With the global warming the rainfall of this region obviously decreases in summer and autumn, and the climatic is turning toward warm and dry.
但降水强度在增大；夏半年降水量的减少主要是降水日数的减少造成的，而冬半年降水量的增加是由于雨日增多和每个降水日平均雨量的增大所造成；随着气候变暖，夏、秋季降水明显偏少，出现暖干化的气候趋势。
参考来源 - 期刊学术社区N（名词） a future time of need, esp financial (将来可能遇到的)困难日子; 穷困时期