A city of southwest Ontario, Canada, on Thunder Bay, an inlet on the northwest shore of Lake Superior. A major port and industrial center, it was created in1970 by the amalgamation of the twin cities of Port Arthur and Fort William. Population,112, 486.是什么意思_A city of southwest Ontario, Canada, on Thunder Bay, an inlet on the northwest shore of Lake Superior. A major port and industrial center, it was created in1970 by the amalgamation of the twin cities of Port Arthur and Fort William. Population,112, 486.在线翻译_英语_读音_用法_例句