波多黎各的28,000英亩的云雀国家森林是美国国家森林体系中唯一的热带雨林。
Puerto Rico's 28,000-acre El Yunque National forest is the only tropical rain forest in the United States National forest System.
波多黎各的28,000英亩的云雀国家森林是美国国家森林体系中唯一的热带雨林。
Puerto Rico's 28,000-acre El Yunque National forest is the only tropical rain forest in the United States National forest System.
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