Yesterday, we went to museum to find something to have a prosentation.
I find crystal to discribe.
It look as through they are man-made but they are all natural objects.
To my opinion,crystal just a nice decoration.
But it is often use in science fiction.
For example, it can be use to stroage.
when the message through the crystal, this information will be recorded.The computer chip had this feature.
One kind of cystal called Quartz.
Which is used in watches to keep time.
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