And captopril, a blood-vessel-relaxing agent widely used to treat hypertension, is based on teprotide, from Brazilian arrowhead vipers, which helps the other toxins in the venom circulate quickly, and thus reach their targets rapidly.

卡托普利11―血管放松剂，广泛用于治疗高血压。它由替普罗肽组，西箭毒蛇12提取，能加速毒液中毒素循环，迅速到达患处。

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。

But inside the mound was indeed evidence for a city that had thrived during the Bronze Age, with charred stone, broken arrowheads, and damaged human skeletons suggesting a violent end.

但是在土丘里面确实有证据表明这座城市在青铜时代蓬勃发展的痕迹，烧焦的石、破碎的箭和受损的人类骨骼表明这是一个暴力时代的终结。

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.

新石器时代开始，在整个欧洲和北美，大规模墓葬遗址都显示明确无误的暴力迹象：带有石斧伤痕的骨、卡进脊椎中的箭和斩首。

Some unfortunate animals ended up in terrariums or aquariums in my house, or I would be out in the plowed fields looking for arrowheads or Native American artifacts or rocks.

有些不走运的动物最后都被放在了我家的鱼缸或水族箱里，或者我在耕地里寻找箭或美洲原住民的手工艺品或石。

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，你可以用铜锻造箭和斧子，但是铜很软，它比石更容易变钝。

Then there was a woman who'd suffered a wound to her fibula that also had healed. Embedded in the bone were rock fragments consistent with what an arrowhead would leave.

有名女子的腓骨受过伤，也痊愈了。骨里嵌入了一些碎岩石，与箭下的碎片吻合。

A stone arrowhead was stuck in his shoulder. Uzi had been shot in the back! Who killed Uzi over 5,000 years ago and why? So far, the case has gone cold.

一个石制箭嵌在他的肩膀上。奥兹是背后中箭！是谁在五千多年前杀害了奥兹，又是为什么？到目前为止，这仍是一桩悬案。

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，比美军最大的飞机还要大上至少四倍。

He found them covered with human bones, potsherds, arrowheads, and other stone artifacts. " It was all there just lying on the sand, " he told me, " everywhere you looked."

他发现那里满地都是人类骨、陶器碎片、箭和其他古代石器。“全都躺在那里的沙子上，”他对我说，“放眼望去都是。”

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，发现大小差异小于 1 厘米，有些只有 0.22 毫米。

The difference between arrowheads is tiny.

每个箭差异都极小。

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

我们在坑中找到超过三万支箭。

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。

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

该市的工匠制作箭、皮革制品、陶器和珠宝。

While aiming, hydro energy accumulates on the arrowhead.

在瞄准时，水流能量在箭上积聚。

Imagine from the top down it looks like an arrowhead.

想象一下，顶部俯视，它形似箭。

Arrowhead is the way they used to be called.

箭石是他们过去常用的称呼。

Next to the site, in a repurposed church, is the Aztalan Museum, which houses hundreds of artifacts, including pottery, arrowheads, and jewelry crafted from copper and shells.

阿兹塔兰博物馆位于遗址旁边一座经过改建的教堂内，收藏了数百件文物，包括陶器、箭以及用铜和贝壳制的珠宝。

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.

你可以去一些地方， 如果你挖得足够深，在像恶地国家公园这样的地方， 你能找到这些箭石。