However, any real crystal always has a finite size.

但是任何真实晶体的尺寸都是有限的。

youdao

This Poodle is made by my own, it's a real crystal, so it will not fade. This is the Taiwan model trains, called the Tzu. I Hope you can sit in Taiwan in the future.

这只贵宾狗是我自己做的哦，它是真正的水晶，所以不会退色哦。这是台湾的火车模型，叫自强号。希望将来你能台湾坐到啰。

youdao

And then, if you go the real sodium chloride crystal and you do this same calculation but in three-dimensions.

接下来，如果回到实际的氯化钠晶体中，你们做同样的计算，但是是在三维中。

youdao

And then, if you go the real sodium chloride crystal and you do this same calculation but in three-dimensions.

接下来，如果回到实际的氯化钠晶体中,你们做同样的计算,但是是在三维中。

麻省理工公开课 - 固态化学导论课程节选

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