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A solution of antifreeze like you put in your car in the winter?
这种解决办法就像我们在冬季往车里加抗冻剂一样吗?
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They consist of clusters of zinc-oxide crystals, which are easily precipitated from a solution of zinc acetate in diethylene glycol (better known as antifreeze) at the right temperature.
ECONOMIST: Microlasers
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