We've converted from oil to gas central heating.

　　我們已經把中央供熱系統由燃油改成了燃氣。

　　The traffic lights are controlled by a central computer.

　　交通信號燈由中心計算機控制。

　　They are seeking a central, directive role in national energy policy.

　　他們正尋求在國家能源政策方面起中心指導作用。

　　One of the hotel's plus points is that it is very central.

　　那個旅館的優勢之一是它處于市中心。

　　One of the hotel's plus points is that it is very central.

　　這個旅館的一大優點是它處于市中心。