今天我们要学的词是underground。 Underground, 地下。为防止辐射物质通过土壤和地下水系统的扩散， "The Japanese government is considering building an underground barrier near the Fukushima nuclear power plant," 日本政府正在考虑在福田核电站周边修建地下拦水墙。在阿富汗的坎大哈市， "Taliban militants dug an underground tunnel and broke out more than 450 prisoners from jail," 塔利班激进分子挖了一条地下通道，帮助一座监狱里的450多名囚犯成功越狱。好的，今天我们学习的词是underground...