Marrow is a soft, spongy tissue inside bone.
骨髓是骨骼中一种柔软的、海绵状的组织。
The Bone Marrow: This is soft spongy tissue which is found in the bony cavities.
骨髓：它是一种存在于骨骼中柔弱的海绵组织。
After solidifying for half an hour, the material reaches the strength of spongy bone.
固化半小时后材料达到松质骨的强度。
After solidifying for half an hour, the material reaches the strength of spongy bone.
固化半小时后材料达到松质骨的强度。
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