Ringback music, also called personalized ringback tone, is a piece of music heard by the caller instead of the traditional telephone ring signal when a telephone call is placed.

“个性化接通回音”则是打电话时，传统的电话提示音被音乐所取代，于是成为了我们所说的“彩铃”。

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The observed changeof each signal as Cassini moved behind the rings provided a profile ofthe distribution of ring material as a function of distance fromSaturn, or an optical depth profile.

卡西尼号远离土星环而观察到的每个信号的变化提供了一份环材料分布的侧写。 这是一个距土星距离的函数，或是一个光学深度剖面。

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Analyzed is influence of eccentric conductive ring on signal responses in the array induction log tool.

分析了偏置导电环对阵列感应测井仪器响应信号的影响规律。

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By 1968 he had concluded that they could be kept in order by stochastic (ie, random) cooling: identifying a wayward particle on one side of the accelerator ring, sending a signal directly across to the other end, and tweaking the magnetic field to nudge the oncoming errant particle back into the beam.

ECONOMIST: Simon van der Meer | The

The patent gets even more creative, suggesting customization options similar to how people assign a variety of ring tones for different contacts and whether the incoming signal is a call, text or alert.

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