ground swell
1 heavy slow-moving waves caused by a distant or recent storm or earthquake 长涌浪（由远方或刚过去的暴风或地震引起的移动缓慢的巨浪）.
2 (fig 比喻) rapidly developing general feeling or opinion 迅速高涨的情绪或舆论声势
Opinion polls have detected a ground swell of support for the Socialists. 民意测验表明拥护社会党的情绪高涨.