地图数据源自美国地质调查局及环境系统研究所。

Data for the map were obtained from U. S. Geological Survey (USGS) and Environmental System Research Institute (ESRI).

youdao

地图数据源自美国地质调查局及环境系统研究所。

Data for the map were obtained from U. S. Geological Survey (USGS) and Environmental System Research Institute (ESRI).

youdao