A city of northwest Portugal near the mouth of the DouroRiver north of Lisbon.
波尔图葡萄牙西北部一城市，位于里斯本北部，杜罗河口附近。
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A train lays down the embankment with the locomotive underwater in the DouroRiver, after it rammed into a boulder which derailed the train Monday Dec. 11, 2000 in Baiao, northern Portugal.