A service of the British Broadcasting Corporation that transmits radio programmes in English and over thirty other languages around the world twenty-four hours a day.
（英国广播公司的）对外广播（1991年建立了类似的向世界范围播出的电视台）
Definition of World Service in US English:
World Service
proper nounwərld ˈsərvəs
A service of the British Broadcasting Corporation that transmits radio programs in English and over thirty other languages around the world twenty-four hours a day. A worldwide television station was established in 1991 on a similar basis.