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Perlite, obsidian and pitchstone are volcanic glass having the same compositions commonly with rhyolite as well as andesite and basalt.

珍珠岩、黑耀岩岩等质熔岩为主,中基者也常见。

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laical, laicise, laicism, laicize, laid, laid back, laid paper, laid-back, laidlomycin, laid-off,

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3G, 401(K), a,

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连线杂志

Also, in terms of ancient stone tools, they're gonna use things like obsidian, it's volcanic glass.

此外,就古代石器而言,他们会使用黑石,火山玻璃。

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十万个为什么

Found in modern day Turkey, these primitive mirrors were made out of a polished volcanic glass called obsidian.

代的土耳其些原始的镜子是由一种叫做黑石的抛光火山玻璃制成的。

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VOA Special 2017年11月

The villagers harvested wheat, raised animals and used simple tools made of bone and volcanic glass.

民们收割小麦,饲养动物,并使用由骨头和火山玻璃制成的简单工具

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剑桥雅思19阅读

Shipton's team's excavation of the shelters at the Kelo site unearthed a volcanic glass substance called obsidian, which must have been brought over from another island, as there is no known source on Obi.

希普顿的团队对 Kelo 遗址的避难所进行了挖掘,了一种叫做黑石的火山玻璃物质,它一定是从另一个岛屿带来的,因为 Obi 没有已知的来源。

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lairage, laird, lairdly, lairdship, laired, lairy, LAIS, laisser-aller, laisser-faire, laissez-aller,

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3G, 401(K), a,
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