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.

在现代土耳其发现，这些原始镜子是由一种叫做黑石抛光火山玻璃制成。

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，并用由骨头和火山玻璃制成工具。

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.

希普顿团队对 Kelo 遗址避难所进行了挖掘，发现了一种叫做黑石火山玻璃物质，它一定是从另一个岛屿带来，因为 Obi 没有已知来源。