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

、黑耀和松脂质熔以酸为主,中也常见。

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libethenite, Libia, LIBID, libidinal, libidinous, libido, libname, libollite, LIBOR, libra,

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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,就古代器而言,他们会使用黑璃。

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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.

在现代的土耳其发现,些原始的镜子由一种叫做黑的抛光制成的。

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VOA Special 2017年11月合集

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

村民们收割小麦,饲养动物,并使用由骨头和制成的简单工具

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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,发现了一种叫做黑物质,它一定从另一个岛屿带来的,因为 Obi 没有已知的来源。

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library science, librate, libration, librations, libratory, librettist, libretto, Libreville, libri, Librids,

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3G, 401(K), a,
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