尿结石是异常生物矿化的产物，由无机晶体和有机基质组成。
Urinary stone is a kind of product of unusual biomineralization. It is made up of inorganic crystal and organic matrix.
晶体表面因复盖有细胞碎片和基质而容易引起聚集，聚集的晶体与暴露的基底膜接触，对微结石的形成起核心作用。
Some crystalline aggregates coming in contact with an exposed basement membrane become attached and play an important role in the formation of microliths.
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