以下为句子列表：
英文: Meanwhile, in the marrow cavity, osteoclasts are eroding the bone that was deposited early in life, and other cells are making secondary bone tissue along the perimeter of the cavity or invading the cortex (outer layer) of the remaining bone to remodel it
中文: 与此同时，在髓腔中，蚀骨细胞持续侵蚀较早沉积的骨质；并有其他细胞沿著髓腔周围产生次生骨组织，或是侵入既存骨骼的皮质（外层）来为其重新塑形。
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