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 pleuroperitoneum
 胸腹膜

 Pleu·ro·per·i·to·ne·um n.  Anat. The pleural and peritoneal membranes, or the membrane lining the body cavity and covering the surface of the inclosed viscera; the peritoneum; -- used especially in the case of those animals in which the body cavity is not divided.
 Note: ☞ Peritoneum is now often used in the sense of pleuroperitoneum, the pleuræ being regarded as a part of the peritoneum, when the body cavity is undivided.
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