The ozone layer surrounds the Earth roughly 25km above us. Many human activities are thinning the layer.

臭氧层在地球表层上空大约25km的位置。许多人类活动正薄臭氧层。

Her hair had been thinned and cut shorter.

【thin】她的头发薄了，剪短了。

Now you can see, here Ive selected a piece of flint which is relatively long and thin - not a great deal of work to thin it down.

“现在瞧瞧，这儿呢，我挑了块燧石，比较细长的，要薄工作量并不大。”

And what we would do then, is actually thin the piece down and refine the shape, work our way round ... and in about 10 to 15 minutes, theres your handaxe.

接我们就把这里细细薄，沿着边缘一圈… … 这样加工上大概十到十五分钟，的手斧就出了。”

For a foreseeable future, because unfortunately, the dense people of this world, not all of you, but some of you are unable to understand that after you have your bone shaved down, right?

在可预见的未， 因为不幸的是，这个世上的某些人， 不是们所有人，但有些人无法理解， 在把骨头薄之后，对吧？