1·Relating to or designating an electric charge of the same sign as that of an electron, indicated by the symbol (-).
负电的，阴电的：关于或标明电的负荷和电子具有相同的符号，用符号(-)来表示的。
2·Marine geography ranges from studying physical characteristics and designating international boundary waters to analyzing marine resources, coastal development, and offshore facility places.
海洋地理学涵盖从研究（海洋）物理特征、标明国际水域边界到分析海洋资源、沿海（地形）演变以及近海设施位置。
3·A map, especially one for motorists, showing and designating the roads of a region.
道路图，尤指供汽车使用的标明或指示某个地区道路的地图。