A sodium chloride crystal is transparent to visible light.

氯化钠晶体对可见光是透明。

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And who knows but a crystal is mist in decay?

但有谁知道那水晶只是衰亡的雾？

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But we will say that the ARK Crystal is still in place.

不过，我们会说，方舟水晶是仍然有效力的。

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David Crystal is a British linguist who has written more than one hundred books, including the book "Language and the Internet."

VOA: special.2010.01.28

The question is can I show you, from an energetic standpoint, that the crystal is favored over having the discrete set of pairs?

我展示你的问题是，从能量的观点出发，晶体倾向于,形成分散的一系列的对？

麻省理工公开课 - 固态化学导论课程节选

A sodium chloride crystal is transparent to visible light.

氯化钠晶体对可见光透明。

麻省理工公开课 - 固态化学导论课程节选

If the second material of the crystal is intended to be air, that is enough.

ECONOMIST: Microelectronics grows up

Unfortunately, the crystal is still a long way from the Mr. Fusion-powered, time-traveling DeLorean that we truly desire.

ENGADGET: Researchers create space-time crystal schematic, still won't undo those ill-advised high school photos

The resulting space-time crystal is being described as something akin to an infinitely running clock that does not require any additional energy once it starts going.

ENGADGET: Researchers create space-time crystal schematic, still won't undo those ill-advised high school photos