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underground (n)/ ˌʌn.dɚˈɡraʊnd//ˌʌn.dəˈɡraʊnd /below the surface of the earth; below grounddưới đất, tàu điện ngầm ![]() Moles live underground. The subway system is an efficient means of transportation underground in urban areas. Some animals create intricate burrows underground for shelter and protection. The rebels operated a network underground to avoid detection by authorities. Urban legends often involve mysterious creatures living underground. Từ vựng khác:outside , train station , museum , banqueting , barber |