结论上鼓室内陷袋反映中耳负压状态，其发病机制与咽鼓管功能、炎症、乳突气化程度相关；
Conclusion:The attic retraction pocket reflected the negative pressure of middle ear and its pathogenesis was related with the function of Eustachian tube, inflammation and pneumatization of mastoid.
本文主要介绍了低酸度酒精阳性乳的性状，发病机理以及防治措施。
This subject introduces characters, reasons and prevent measures of alcohol test positive milk.
组和2组隐性乳腺炎的乳区发病率差异不显著（P>0 05），与对照组差异极显著（P<0 01）；
The udder region incidence of the group 1 was not remarkable (against that) of the group 2 (P>0.05), and the incidence against control was significantly remarkable (P<0.01).
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