的;
，胶Single cancellous osteomas, unlike exostosis, are a relatively rare lesion in the external auditory canal.
单一性疏松
瘤，不像外生疣，是一个外耳道较少见的病灶。
Single cancellous osteomas, unlike exostosis, are a relatively rare lesion in the external auditory canal.
单一性疏松瘤，不像外生疣，是一个外耳道较少见的病灶。
Blood production —The marrow, located within the medullary cavity of long bones and the interstices of cancellous bone, produces blood cells in a process called haematopoiesis.
造血-
位于长腔和松质间隙内，
过造血作用产生血细胞。
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