在一些地方，这种称为“白色空间”的用来隔离工作频道的未使用的频率最多占到电视转播中可用带宽的70%。

In some places, this so-called "white space" of unused frequencies separating working channels amounted to as much as 70% of the total bandwidth available for television broadcasting.

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某些地方，这种将工作频道与闲置频率分隔开的“空白频段”，统共占到了电视广播全部可用带宽的差不多70%。

In some places, this "white space" of unused frequencies separating working channels amounted to as much as 70% of the total bandwidth available for television broadcasting.

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这种关系表明雷达可用的信号带宽是有一定限制的，随着工作频率的下降和成像斜角的增大，可用的信号带宽会变得越来越小。

The relationship shows that the maximum bandwidth is limited for these algorithms and becomes narrow when the center frequency is lower and the imaging squint angle is larger.

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