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Scientists do not know exactly how this process prevents ice crystal formation.
科学家们还不清楚这个过程是如何阻止冰晶形成的。
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Hexagonal ice crystal are the basic form of the particles in cirrus.
六角柱冰晶是卷云中粒子的基本形态。
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Hexagonal ice crystal are the basic form of the particles in cirrus.
六角柱冰晶是卷云中粒子的基本形态。
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