单词：unpaved airfield
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Many countries, including Australia, Britain and Canada, have privatised air-traffic services or turned them into state-owned firms. 许多国家，包括澳大利亚、英国和加拿大，已经私有化的空中交通服务或转为国有企业。
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The mothers of three young Americans in prison in Iran are back in the US, but they arrived this afternoon at New York's JFK Airport without their children who've been charged with espionage. Nora Shourd, the mother of one of the Americans recounts t
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