association tract的意思|示意

The other 41 benign cases included biliary tract calculi 32, cholangitis 8 consisted of association with calculi 4 and duodenal villus adenoma 1.

良性病变41例，胆管结石32例，胆管炎8例，其中4例伴胆管结石，十二指肠绒毛腺瘤1例。

To observe upper digestive tract mucosa lesions of uremic patients and to analysis the association among mucosa lesions and clinical symptom and dialysis.

目的观察尿毒症患者上消化道黏膜病变的情况并分析其与临床症状和透析的关系。

Is the observed association between BV and upper tract colonization sufficient to explain the association between BV and spontaneous preterm birth or other adverse outcomes?

已观察到的BV和其细菌上游定居之间的联系，是否足以解释BV和自发性早产或其他不利结果之间的联系？