close down
(of a radio or television station) stop broadcasting (指无线电台或电视台)停止广播
It is midnight and we are now closing down. 时间已到午夜, 本台现在停止广播. close (sth) down (cause sth to) stop functioning or operating; shut (sth) down permanently (使)停止运转或操作; 永久关闭; 倒闭
Many businesses have closed down because of the recession. 因经济衰退许多企业纷纷倒闭.