The pleurae are serous membranes, which mean they secrete a lubricating fluid, called serous fluid.
胸膜为浆膜,这意味着它分泌润滑液,即浆液。
The pleurae are serous membranes, which mean they secrete a lubricating fluid, called serous fluid.
胸膜为浆膜,这意味着它分泌润滑液,即浆液。
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