动词
中文翻译：窄播
同义词：
['broadcast', 'broadcast', 'restrict']
例句：
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1.The news channel narrowcast to a specific demographic group.
新闻频道针对特定人群进行窄播。
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2.The company has decided to narrowcast its advertising messages to a more targeted audience.
公司决定将广告信息窄播给更有针对性的受众。
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3. The government has restricted broadcasting of certain information due to security concerns.
由于安全考虑，政府已限制某些信息的广播。