The traveller on the prairie is naturally a hunter, on the head waters of the Missouri and Columbia a trapper, and at the Falls of St.Mary a fisherman.是什么意思_The traveller on the prairie is naturally a hunter, on the head waters of the Missouri and Columbia a trapper, and at the Falls of St.Mary a fisherman.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句