monsoon       
noun [ C ] uk/mɒnˈsuːn/ us/mɑːnˈsuːn/
 (炎热的亚洲国家的)季风季节,雨季
the season of heavy rain during the summer in hot Asian countries
  The failure of the monsoon would destroy harvests on which a billion people rely. 雨季的雨量不足会毁掉10亿人赖以生存的收成。