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来源:雅诚德英语网
Bone marrow is an exception to this rule, however, since even in adults, bone marrow cells continually divide to replace old blood cells.
然而,骨髓是个例外,因为即使在成年人体内,骨髓细胞也在不断分裂,以取代老化的血细胞。
Bone marrow is an exception to this rule, however, since even in adults, bone marrow cells continually divide to replace old blood cells.
然而,骨髓是个例外,因为即使在成年人体内,骨髓细胞也在不断分裂,以取代老化的血细胞。