这些囚犯可自由收看官方频道，但是出于安全考虑，他们不能观看私立频道播放的节目。
Inmates there are free to watch the national channels, but are not allowed to watch private channels for security reasons.
但当扩音器播放南楼安全的通告后，他们两个分别返回了办公室。
But when the announcement came over the loudspeaker that the tower was safe, they both went back to work.
一家名为Co - op的连锁杂货店，正在尝试在店外播放古典音乐来阻止年轻人在附近晃来晃去、威胁到顾客的安全。
Co-op, a chain of grocery stores, is experimenting with playing classical music outside its shops, to stop youths from hanging around and intimidating customers.
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