在一些频率，它能穿透墙壁。

At some frequencies, it can penetrate walls.

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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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注意，在稠密直方图中 7-12 度附近出现了偶然性的不平滑，有一些温度频率非常高， 也有一些频率出人意料地低。

Notice the odd roughness of the dense histogram in the region around 7-12 degrees, with both very high frequency of some measurements and unexpectedly low frequencies of others.

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