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

我们在坑中找到超过三万支头。

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

它就像一枚钢制头，比美军最大还要大上至少四倍。

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头。

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头。

The difference between arrowheads is tiny.

每个头差异都极小。

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

该市工匠制作头、皮革制品、陶器和珠宝。

While aiming, hydro energy accumulates on the arrowhead.

在瞄准时，水流能量会在头上积聚。

Imagine from the top down it looks like an arrowhead.

想象一下，从顶俯视，它形似头。

Arrowhead is the way they used to be called.

头石是他们过去常用称呼。

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

头所指阴在脱模方向上有一个倒扣。

The arrowhead area can be molded on the core side .

头区域可以在动模侧成型。

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

我当时拿着金属探测器找头。

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

夏天，玛丽亚在高高草丛中寻找头。

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

这比在草丛中找到头更让玛丽亚兴奋。

The artefacts from the Second Intermediate Period also include a cache of arrowheads, which is interesting.

第二中间期出土文物中还包括一批头，颇为引人注目。

They lost an arrowhead, which was a long time ago, but it just felt like that.

他们丢了一个头，那已经是很久以前事了，但感觉就像刚发生一样。

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

他意思是，让我们研究圣人、圣人、非凡人、头。

Yes, and it was quite an innovation because the arrowheads they were using before were made of dandelion heads.

是，这确实是一次重大创新，因为他们之前使用头是由蒲公英头状花序制成。

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

乔治·贾斯特：然后你把手伸进口袋，头或其他东西还在。

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

头处十字筋有台阶，不利于加工和抛光。