Twin Mountain Town of名称
National Geographic - Twin Town国家地理频道;英文名
N（名词） a town that has civic associations, such as reciprocal visits and cultural exchanges, with a foreign town, usually of similar size and sometimes with other similarities, as in commercial activities 姊妹城; 与外国城市有城市间联系的城镇，如相互造访和文化交流 [英国英语]