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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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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The key is to listen to a blow in one breath with no response, an echo effect of the more insulation the longer the crisp note well!

关键是要听取打击一口气没有得到答复，一个更绝缘回声效果的时间越长，脆的说明以及！

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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"