The effect, called a light echo, has been unveiling never-before-seen dust patterns ever since the star suddenly brightened for several weeks in early 2002.

这种效应被称之为“回光”，揭示了自2002年初V838 Mon亮度在几周内突然增大后从未被观测到的尘云图案。

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The inverse synthetic aperture radar (ISAR) echo signal model of fast-moving target and the effect of target fast-moving on ISAR signal processing were analyzed.

分析了高速运动目标的逆合成孔径雷达（ISAR）回波信号模型和目标高速运动对ISAR信号处理的影响。

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Finally, you can preview the sound effect by clicking preview in the Echo window, shown in Figure 4.

最后，您可以单击echo窗口的Preview预览音效，如图4所示。

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This echo effect can be heard on the recording of this huge hit for the Supremes in nineteen sixty-four, "Where Did Our Love Go?"

VOA: special.2009.05.11

It's what we call a light echo, an effect that we've seen around supernovas - stars that explode - and because of the vast scales involved, the speed of light is actually very slow.

NPR: What Makes Our Solar System Special?

Dana Milbank chimed in to argue that the rise of Twitter had created an echo chamber effect among campaign journalists that shapes these shared narratives, literally moment-by-moment.

FORBES: Data Will Kill the Political Media "Narrative"