词条„pumice“在英语 » 中文中的译文

pumice [ˈpʌmıs] 名词

pumice

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pumice

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英语

A green tuffbreccia composed of pumice fragments, feldspar crystals and minor debris is recognizable in several areas.

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Several hundred cubic kilometres of ash and pumice were ejected, causing the magma chamber underneath the erupting vents to collapse.

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This volcanic activity was followed by at least two younger, but still undated eruptions, including an undated air-fall pumice deposit.

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Most pumice contains tubular microvesicles that can impart a silky or fibrous fabric.

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People with dry skin should avoid exfoliants which include a significant portion of pumice, or crushed volcanic rock.

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The platform walls are of fine workmanship, being built with well-cut and carefully fitted pumice.

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Nowadays the definition of pozzolana encompasses any volcanic material (pumice or volcanic ash), predominantly composed of fine volcanic glass, that is used as a pozzolan.

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Pumice can be seen on the forest floor, indicating previous volcanic activity.

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Surviving masonry consists of cut blocks of tuff or pumice, and of flagstone.

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Evidence for this theory is the existence of pumice consisting of light and dark material, the dark material being of much hotter origin.

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