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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Popular elements do not appear out of place in Glass's classical music, which from its early days has shared certain harmonies and rhythms with rock music.

在格拉斯的古典音乐中，流行元素并不显得格格不入，从早期开始，古典音乐就与摇滚音乐共享某些和声和节奏。

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Under normal conditions, rocks composed of clay produce far less friction than do other rock types.

在正常情况下，由粘土组成的岩石产生的摩擦要比其他类型的岩石小得多。

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But the fact is that I'm sure there are a few people - - thay may be more than a few in the facility - who do feel that rock and roll is not exactly what one says fit and proper.

不过事实上，我相信,在学校里确实有许多人-,认为摇滚和艺术,并不完全相称。

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Nor do farmers, many of them rock-ribbed Republicans, readily acknowledge that the windbreaks and other conservation projects started by the CCC helped preserve the land from devastating erosion.

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"There are bands out there that I'm confident are going to break through, but I do feel that the greats - those big rock 'n' roll bands that have this great big following and dominate the market - are a factor of yesteryear, sadly, " she says.

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"To have someone like Ray -- like rock 'n' roll royalty -- embrace what we do, it was great for our confidence, " Doe told CNN in a 2004 interview.

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