They found evidence of use-like small fractures-along the edges of the inch-long flakes.

他们，这种1英寸长的石边缘有使用痕迹——小裂口。

Places like Mount Rushmore, people take the chips that were created when they created the sculptures.

像拉什莫尔山国家纪念公园这样的地方，人们会拿走当时制作雕塑时留下的石。

We can tell slate from all other rocks by the way it splits into very thin layers.

板石跟其他石头的不同, 就在于它能分成非常薄的石。

The team then tested replicas of the flakes to butcher wild boars and deer and sheep.

之后，研究团队对石复制品进行了测试，用其来宰杀野猪、鹿和羊。

Pieces of slate are put on the roofs of houses, to keep out the rain. Water cannot pass through slate.

板石也放在屋顶, 用来挡雨。水是透不过板石的。

They're like fragments of pottery, projectile points, and flaked stones.

它们就像陶器碎、箭头和石。

The stone piece seems to be a broken vase, probably a jar for ointment or oils.

这块石看起来像是一个破损的花瓶，很可能是用来盛放药膏或油的罐子。

His team studied 283 stone flakes found in Israel, at a site inhabited by our Homo erectus relatives, half a million years ago.

他的团队研究了283块石，这些石于我们直立猿人近亲50万年前的以色列居住地点。

And now archaeologists have examined another overlooked artifact-small stone flakes, typically thought to be by-products from the production of tools like hand axes and cleavers.

在考古家研究了另一件被忽视的人工制品——小石，这通常被认为是手工斧和砍刀等工具产的副产品。

Anyway, and that spin is called gyroscopic stabilization, but that allows the rock to stay at a certain angle to the water.

总之， 这种旋转被称为陀螺稳定效应，正是这种效应使得石能够保持与水面成一定角度。

He started with a clean " slate" , took nothing for " granite" , got ready for a " feldsparing" match, utterly " pumiced" the competition.

他从一块干净的“石板”开始，认为没什么是理所当“花岗岩”的，他为一场“长石”比赛做了准备并完全“磨掉”了比赛。

The bathroom floor was only chipped, but a piece the size of a baby's fist sheared off the stone, destroying its strange symmetry.

浴室地板只是有些破损，但一块拳头大小的石从石材脱落，破坏了它那奇特的对称美。

And now archaeologists have examined another overlooked artifact—small stone flakes, typically thought to be by-products from the production of tools like hand axes and cleavers.

在， 考古家检查了另一件被忽视的文物——小石，通常被认为是手斧和切肉刀等工具产的副产品。

Pretty things! fine things! cried the little girl enthusiastically, holding up two glittering fragments of mica. When we goes back to home I'll give them to brother Bob.

小女孩拿起两块云母石给他看，高兴地说：多漂亮啊！真好！回家我就把它送给小弟弟鲍伯。

The most prominent feature of the cluster is that most tomb chambers were constructed with stone pieces, but some tombs were made of brick and stone.

据介绍，该墓葬群最突出的特征是墓室普遍采用一种俗称" 砂轮" 的石构筑，也有部分墓葬以砖石合构。

That allowed us to make lots of samples and to see how many more skips you would get if you varied either the diameter or the thickness.

这使我们能够制作大量样品，并观察当改变直径或厚度时，石能多跳跃多少次。

" Hodor, don't" ! said Bran, but too late. Hodor tossed the slate over the edge. " You shouldn't have done that. You don't know what's down there. You might have hurt something, or... or woken something up" .

" 阿多，不要！" 布兰说，但太晚了。阿多将石扔过了边缘，" 你不该这么做，不知道下面有什么。也许会伤到什么，或者… … 或者唤醒什么。"