He found that the length of time it takes a sound's echo to decay is determined by the absorption of the sound's original energy by surrounding material.

他发现，声音回声衰减的时间长短取决于周围物质对声音原始能量的吸收。

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When the star exploded, it sent out a blast wave into the surrounding material, scooping up interstellar dust and gas as it went, like a snow plow.

当这颗恒星爆发的时候，它产生的冲击波向周围扩散，如同一个铲雪犁一般掀起路径上的星际尘埃。

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In this video segment, John Coonrod of Rogers Corporation helps viewers understand the confusion surrounding material data comparisons.

在本视频中，罗杰斯公司的孔罗德先生将帮助观众来正确理解材料数据对比。

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Stardust passed through a cloud of material surrounding comet Wild Two in January of two thousand four.

VOA: special.2009.09.30

His control of the scene is remarkable, but it makes one laugh, too, because in so much of the surrounding interview material, the director describes himself as a kind of medium through which a given movie passes, a mere craftsman in the service of reverie.

NEWYORKER: Fellini: I'm a Born Liar

Another theory suggests that material surrounding a young star can undergo gravitational collapse under its own mass.

WSJ: Possible New Planet Spotted Under Formation

Also, be wary of creating the allusion of power and success by surrounding yourself with material items beyond your means.

FORBES: Assume the Position: Posing Your Way to Personal Power And Excellence