此外，最近针对在奥尔梅克遗址发现的黑曜石工具的研究表明，奥尔梅克人获得的一些黑曜石起源于特奥蒂瓦坎附近。

Moreover, recent research on obsidian tools found at Olmec sites has shown that some of the obsidian obtained by the Olmecs originated near Teotihuacán.

youdao

坚硬的火山岩是一种多年来需求量很大的资源，至少从奥尔梅克人（一种生活在公元前1200年至400年之间的民族）崛起以来是这样。

The hard volcanic stone was a resource that had been in great demand for many years, at least since the rise of the Olmecs (a people who flourished between 1200 and 400 B.

youdao

在如今的美国也仅仅只有大约1000多名卡尔·梅克人。

Today there are still only about 1, 000 Kalmyks in the United States.

youdao