We found more than 30,000 arrowheads in the pits.

我们在坑中找到超过三万支箭头。

The difference between arrowheads is tiny.

每个箭头差异都极小。

Mass production was the only way to explain the large numbers of arrowheads we found.

只有大规模生产才能合理解释我们所发现的箭头。

I think they used moulds, so they were able to produce massive amounts of arrowheads with tiny differences.

我认为他们使用了模具才有可能制造差异如此之小的箭头。

The city's artisans made arrowheads, leather goods, pottery, and jewelry.

该市的工匠制作箭头、皮革制品、陶器和珠宝。

An " arrowhead" (arrowhead) is the end or the " tip, " we would call it, of an arrow.

“arrowhead”（箭头）是箭头的末端或“尖端”，我们称之为箭头。

In summer, Maria hunted through the high grasses for arrowheads.

夏天，玛丽亚在高高的草丛中寻找箭头。

Jorge Just: And you reach in your pocket, and you still have the arrowhead or whatever.

Jorge Just：当你把手伸进口袋时，你仍然有箭头之类的东西。

This was even more exciting for Maria than finding arrowheads in the grass.

这比在草丛中找到箭头更让玛丽亚兴奋。

Copper has a nice shine, and you can use it to make arrowheads and axes, but it is soft and gets blunt more quickly than stone.

铜闪着美丽的光，你可以用铜锻造箭头和斧子，但是铜很软，它比石头更容易变钝。