narrowcasting
v.
（为少量特定听众）小范围播送，用电缆电视播送( narrowcast的现在分词 );
例句:
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Though their audience will be at further by a fresh attack of narrowcasting barracudas.
尽管他们的观众群可能还会被梭鱼一样凶的窄播系统再咬去一些.
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Most important, direct-mail consultants are in the business of narrowcasting rather than broadcasting.
来自NEWYORKER
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This is a more efficient way of transmitting text content - effectively "narrowcasting" it, instead of broadcasting it.
来自BBC