economic belt的用法和樣例：
例句
- Mayors of four provincial capital cities in central China have signed a strategic partnership agreement vowing a coordinated effort in building the Central China Economic Belt.
中國中部4個(gè)省會(huì )城市的市長(cháng)簽署了戰略合作協(xié)議，發(fā)誓協(xié)調一致作出努力，建設中國中部經(jīng)濟帶。
