鼻结石是一少见且通常无症状的情况。
Rhinolithiasis is an uncommon and usually asymptomic condition.
该疾病能造成脊柱成角度，但通常无症状。
It can lead to an Angle in the spine, but there are usually no symptoms.
其他以前确定的多瘤病毒普遍存在于一般民众，通常无症状。
Other previously identified polyoma viruses are widespread in the general population, where they typically produce no symptoms.
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