关于为什么我们做彩色的梦和黑白的梦，Sumber从总体上做了猜测。

Sumber speculates in general why we dream in color and black and white.

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亚马逊表示，它能够印刷全彩色和黑白书籍，这将和传统书籍“毫无区别”。

Amazon said it would be able to print books in both full colour and black and white and said the books would be "virtually indistinguishable" from traditionally printed titles.

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PediaPress尺寸大小是8″ x 5.5″，彩色封面和黑白内页，价格也很合理。

PediaPress books are bound in dimensions 8″ x 5.5″ with a color cover and black &white interior, and the prices are reasonable.

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