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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、黑耀岩和松脂岩岩以酸性为主,中基性者也常见。

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Jabil, jabiru, jaborandi, jaboridine, jabot, jaboticaba, jabs, JAC, jacal, jacamar,

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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,他们会使用黑曜石,这玻璃。

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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.

在现代的耳其发现,这些原始的镜子叫做黑曜石的抛光玻璃制成的。

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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,并使用骨头和玻璃制成的简单工具。

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Jack London, jack mackerel, Jack Nicklaus, jack of all trades, Jack Pine, jack plane, jack screw, Jack the Ripper, jack up, jackadandy,

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3G, 401(K), a,
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