你既可以打印黑白的也可打印彩色的，你甚至还可以去买夜光的摹写纸。

You can print black or colours or even buy "glow-in- the-dark" Transfer Paper.

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极地中层云也被称为夜光云层（noctilucent）（就是在夜晚还闪光的云）。 这一特点在这张太空照片上显露无疑。

Polar mesospheric clouds are also known as noctilucent or “night-shining” clouds—a property that is clearly visible in this astronaut photograph.

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利用拉塞尔NASA项目获得的数据绘制的夜光云效果图。

Captured by flickr user, breff 3. A rendering of the noctilucent clouds created from data obtained by Russel’s NASA project, AIM.

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