Glass, which has been made since the time of the Mesopotamians and Egyptians, is little more than a mixture of sand, soda ash and lime.

自从美索不达米亚和埃及时代以来，玻璃就已经被制造出来了，它只不过是沙子、苏打灰和石灰的混合物。

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This time there were TWO little shrieks,and more sounds of broken glass.

这次传来了两小声尖叫，还有更多玻璃的破碎声。

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I'm jealous, even though it looks dorky. (Just go to the " White Men Wearing Google Glass" Tumblr for proof.) I've spent some time with Glass here and there, mostly asking Explorer pals if I can try theirs, and every time, I almost cried when I had to give it back.

WSJ: Google Glass: An Etiquette Guide

"They had two or three guys going to the glass every time, " Conley said.

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Colorblind users may also want to check out another, free app that offers real-time imaging called Chromatic Glass.

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