今天我们要学的词是 root cause。Root cause 根本原因。世界经济论坛说，The lack of competitiveness in Europe is the root cause of financial instability and rising unemployment numbers in the region. 缺乏竞争力是欧洲经济不稳定和失业率高的根本原因。波音787梦幻客机全面停飞。The root cause for the Dreamliner's problems are currently under investigation. 梦幻客机根本问题出在哪里目前正在调查之中。The root cause of gun violence in the U.S. is a hot button topic these days. 美国枪支暴力的根本原因是如今的热门话题。好的，今天我们学习的词是 root cause, root cause, root cause...