the large and middle cities的用法和樣例：
例句
- We have opened 14 large and medium-sized coastal cities.
我們開(kāi)放了十四個(gè)沿海城市，都是大中城市。 - So far we have set up plenty of outdoor billboards in the big or medium-sized cities in the Pearl River Delta region, including Macao.
我們在澳門(mén)，珠江三角洲地區等多個(gè)大中城市擁有多塊戶(hù)外看板。
