In the United States, regional HSGT systems could utilize the airport of a major metropolitan area as a hub and extend service to smaller surrounding cities or airports.是什么意思_In the United States, regional HSGT systems could utilize the airport of a major metropolitan area as a hub and extend service to smaller surrounding cities or airports.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句