Long called the forest City,? Portland maintains at least 20, 000 trees today, including about a hundred elm trees that survived a 1960s outbreak of Dutch elm disease.
波特兰一直有森林城市的美称，今天它拥有的树木至少2万棵，其中包括约100榆树，它们历经20世纪60年代爆发的荷兰榆树病而幸存下来。
Long called the "Forest City," Portland maintains at least 20, 000 trees today, including about a hundred elm trees that survived a 1960s outbreak of Dutch elm disease.
长期以来被称为“森林城市”，波特兰今天至少保留着20,000棵树，其中包括约100棵榆树，它们在20世纪60年代所爆发的荷兰榆树病中幸存了下来。
Long called the "Forest City," Portland maintains at least 20, 000 trees today, including about a hundred elm trees that survived a 1960s outbreak of Dutch elm disease.
长期以来被称为“森林城市”，波特兰今天至少保留着20,000棵树，其中包括约100棵榆树，它们在20世纪60年代所爆发的荷兰榆树病中幸存了下来。
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