| 1. | Heat waves and floods are likely to become more frequent , threatening the elderly and infirm , and three quarters of the swiss alps ' glaciers might melt down by 2050 , the study prepared by the european environment agency ( eea ) said 欧洲环境组织( eea )最近的一项研究报告表示,更加频繁的热浪和洪灾正威胁着瑞士阿尔卑斯山脉已经不再坚固的冰川,到2050年,其中四分之三的冰川将被熔化 |