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，会使用黑石，这是火山玻璃。

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，这些原始的镜子是由一种叫做黑石的抛光火山玻璃制成的。

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

村民收割小麦，饲养动物，并使用由骨头和火山玻璃制成的简。

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。