defabbr.防御（=defense）abbr.延缓的（=deferred）abbr.定义（=definition）abbr.明确的（=definite）Defais德费

1. This power reduction, in turn, allows Zenith's HDTV signal to use the channels that usually are empty in crowded city television markets.
   这种功率减小转过来又能使齐尼思公司的高清晰度电视信号在拥挤的城市电视市场中利用那些通常空闲的频道。