Coupling associates each ion with both characteristic frequencies.

耦合使每个离子都具有了两个电子的特征频率。

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As you can see in Figure 1, the human voice produces a distinct average of characteristic frequencies when speaking.

如图1所示，人类语音在说话时将生成独特的平均特征频率。

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Such waves travel at a known speed and have characteristic frequencies, so the team knew what to look for and when.

此波速率传播一定且有特征频率，所以这个研究团队知道他们找什么，在哪找。

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Since different assemblages of molecules have different characteristic frequencies, Turin proposed, these vibrations could act as a molecular signature.

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"Some of (the waves) will resonate, just like a musical instrument - the turbulence causes them to ring at frequencies that are characteristic of the star, " Prof Elsworth told BBC News.

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