Police, firefighters and medical crews had trouble talking to each other because they were using different radio frequencies.

因为使用不同的无线电频率，警察、消防队员以及医务人员在交谈方面遇到了困难。

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The video for this song was shot using different film frequencies, allowing various actions to unfold at different rates within the same frame.

这首歌的视频使用了非常手段，使得一个画面中的各种动作以不同的速度进行。

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A generalized morphological filtering method using different sampling frequencies is proposed for sampled power system signal.

针对电力系统采样信号，提出一种采用不同采样频率的广义形态滤波方法。

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"In major incidents where the responding emergency personnel involved come from different jurisdictions or agencies, each using its own radio frequencies, the issue of radio communications among and between responding agencies remains a challenge, " Buckman told the senators.

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