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.

只有模生产才能合理解释我们所发现的箭头。

Like a giant steel arrowhead, at least four times the size of the biggest US Army plane.

它就像一枚钢制的箭头，比美军最的飞机还要上至少四倍。

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。

I was out with my metal detector, looking for arrowheads.

我当时拿着金属探测器找箭头。

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。

There is an undercut in the shadow pointed by the arrowhead in the pulling direction.

箭头所指阴影部分在脱模方向上有一个倒扣。

The arrowhead area can be molded on the core side .

箭头区域可以在动模侧成型。

The cross rib of the arrowhead has a step that does not facilitate machining and polishing.

箭头处的十字筋有台阶，不利于加工和抛光。

What he's saying is that, let's study the sages, the saints, the extraordinary people, the arrowhead.

他的意思是，让我们研究圣人、圣人、非凡的人、箭头。

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。

But if I add feathers to the tail of this arrow and a metal arrowhead in front, can't it shoot further and penetrate deeper?

但是如果我在这支箭的尾部加上羽毛， 前面加上一个金属箭头，它就不能射得更远， 穿透得更深吗？

We tested the arrowheads, and found the difference in their sizes to be less than 1cm, some of them only have a difference of 0.22mm.

我们检验了箭头，发现小差异小于 1 厘米，有些只有 0.22 毫米。

You can go to some of the areas and, if you dig around enough, in places like Badlands National Park you can find these arrowheads.

你可以去一些地区， 如果你足够深入，在像荒地国家公园这样的地方， 你可以找到这些箭头。

From Neolithic times, across Europe and North America, sites of mass burials show unmistakable signs of violence: skulls with stone-axe injuries, arrowheads lodged in vertebrae and decapitations.

从新石器时代开始，在整个欧洲和北美，模墓葬遗址都显示出明确无误的暴力迹象：带有石斧伤痕的头骨、卡脊椎中的箭头和斩首。