常见例句The first reported event of this kind in the United States happened in Donora, a factory town in a valley near Pittsburgh. 据报导,在美国的第一起这类事件发生在靠近匹兹堡的多诺拉。多诺拉是一个城镇,那里全是工厂。Donora crisis 美国多诺拉事件 返回 Donora