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。

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We do not know much yet about the moon's mantle, that section of superheated rock which goes down hundreds of miles below the crust.

我们对月球地幔所知不多，那些过热的岩石在外壳几百英里以下。

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Should we, as some preachers and churches do, condemn rock as evil, forbid our children to listen to any of it, and burn the records or tapes we might have?

我们是否应该像某些宣教士或者教会那样怒斥摇滚乐为邪恶，禁止儿童听任何摇滚乐以及烧掉CD和磁带吗？

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So we go and do rock climbing

所以我们去攀岩，

想加入社团 - SpeakingMax英语口语达人

"We were compelled to do it because we were between a rock and a hard place, " explained Lutfullah Kamran, a 24-year-old computer-science graduate who is commander of the new Andar ALP.

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"Our whole thing is so 'rock': we do crossword puzzles, " she says.

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What we do know is that NBC, Rock Center, Mr. Williams, and Dr. Snyderman did us all a disservice, especially those suffering from out-of-control Internet behaviors.

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