But rock art also has a practical value for researchers and let's start by considering why that is.
但岩石艺术对研究人员来说也有实用价值，让我们先来看看为什么会那样。
But rock focuses more on individuals and some social problems.
但是摇滚乐更多地关注个人和一些社会问题。
Anyone can go hiking, but rock climbing really separates the men from the boys.
谁都能去徒步旅行，但是攀岩才能真正考验人的体能。
The second Bear put out both paws but Rock rolled right over him, squashing him as thin as a pancake.
第二个熊爪，但都推出了岩石滚权在他身上，挤压他像薄煎饼。
She sings with a rock band, but she's also a jazz musician in her own right.
她随一支摇滚乐队演唱，但她本身也是爵士乐手。
But that makes it easier to identify something as a meteorite, as opposed to just a terrestrial rock.
但是，这使得我们更容易将东西识别为陨石，而不仅是地面的岩石。
But when it wants to blend in with its environment to hide from its enemies, it can take on the color of its immediate surroundings: the ocean floor, a rock, a piece of coral, whatever.
但当它想要融入环境以躲避敌人时，它就会呈现出周围环境的颜色：海底、岩石、珊瑚等等。
Quite near the rock, but out of sight, two heads were bobbing up and down, Peter's and Wendy's.
离岩石很近，但看不见的地方，有两个脑袋上下浮动，是彼得的和温迪的。
A small place near a tree or a rock will be the warmest, but be careful before you decide where to sleep.
靠近树或岩石的小地方会是最温暖的，但是在你决定哪里睡觉之前要小心。
It actually had a strong influence on the development of several musical genres—rock and roll, most notably, but also jazz and blues.
事实上，它对很多音乐流派的发展都产生了重要的影响——最主要的是摇滚乐，但也包括爵士乐和布鲁斯音乐。
It isn't actually known how many sites there are across Australia where rock art can be found—but unfortunately, we do know that much of the art is being lost to us.
目前还不知道在澳大利亚有多少地方能够发现这种岩石艺术；但不幸的是，我们知道有很多艺术作品正在消失。
However, when two monkeys were placed in separate but adjoining chambers, so that each could observe what the other was getting in return for its rock, their behavior became markedly different.
然而，当两只猴子被放置在不同但相邻的房间里，以便让它们观察到对方用石头换来了什么时，它们的行为就变得明显不同了。
Also, in surface water, there is a weak acid, carbonic acid, not sulfuric acid, but carbonic acid that helps dissolve the rock.
另外，在地表水中存在一种弱酸，它是碳酸，而不是硫酸，而且是能帮助溶解岩石的碳酸。
It was like coming out of slime on to rock—we were worried but not soiled.
这就像走出烂泥地，来到了石岩上——我们还会忧虑，但已不怕被弄脏。
The specimen, complete with surrounding rock, had been on display for the past 50 years at a museum in Poland, but amazingly no one had spotted the footprint.
这个标本连同周围的岩石，在过去的50年里一直在波兰的一家博物馆陈列，但令人惊讶的是，从未有人发现这个脚印。
As I said before, you can find rock art all over the world, but I'd like to focus now on the rock art of the Aboriginal people of Australia.
就像我之前说的，世界各地都有岩石艺术，但是我现在想要关注的是澳大利亚土著人的岩石艺术。
Glass based two symphonies on music by rock musicians David Bowie and Brian Eno, but the symphonies' sound is distinctively his.
格拉斯以摇滚音乐家大卫·鲍伊和布莱恩·伊诺的音乐为基础创作了两部交响曲，但这些交响曲的声音是他独特的。
Earth's surface is not made up of a single sheet of rock that forms a crust but rather a number of "tectonic plates" that fit closely, like the pieces of a giant jigsaw puzzle.
地球表面并不是由构成地壳的单块岩石构成，而是许多紧密相连的“构造板块”，像一块巨大的拼图。
Stonehenge, a rock circle, is not only one of Britain's most famous historical places but also one of its greatest mysteries.
巨石阵是一个巨石圈，它不仅是英国最著名的历史遗迹，也是英国最大的谜团之一。
But the rock is reasonably widespread, being both the underlying stuff of ocean floors and a common outpouring of terrestrial volcanoes.
但是，这种岩石还是相当广泛，因为它既是海床基本物质，也是常见的陆地火山喷发物。
But think of those same drops of effort dripping onto one tiny spot, perhaps not in the ocean but on a rock.
但我们把努力的水滴看做是在滴入一个微小的点上时，滴入的或许不是海洋，而是一块石头上。
Nevertheless it was like coming out of slime on to rock — we were worried but not soiled.
不过，这就像走出烂泥地，来到了石岩上- - -我们还会担心，但已不怕弄脏。
The ideal test would be to go to the far side of the moon and collect a rock sample, but no mission like that is planned, she says.
验证这个想法需要去向月球的远地点去收集岩石样本，但是还没有科研计划有这个任务，她说。
It was later proved a fake, not unearthed by scientists, but bought at a rock show in the US.
后来这具化石被证实是假的，不是由科学家所发现的，而是购自美国某石头展览的拼假化石。
"We know we live on a rock, but the poor people of Ascension live on a cinder," the residents of St Helena had joked before his departure.
“我们知道我们生活在岩石上，但阿森松岛可怜的人们是生活在火山灰渣上，”圣赫勒拿岛的居民在他离开之前曾开玩笑说。
SARAH PALIN may be the Republican Party's rock star, but Mike Huckabee can actually play the bass guitar.
萨拉·佩林或许是共和党的摇滚明星，但麦克-赫卡比却真正能够弹奏贝斯。
I don't remember falling asleep, but I woke up on that rock several hours later.
我不记得何时进入梦乡了，但是几小时后，我在岩石上醒来。
He plunged down again. He could see nothing through the stinging salt water but the blank rock.
他又一次潜到水中，除了那块岩石，透过咸咸的刺人眼痛的海水，他什么也看不见。
He plunged down again. He could see nothing through the stinging salt water but the blank rock.
他又一次潜到水中，除了那块岩石，透过咸咸的刺人眼痛的海水，他什么也看不见。
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