未经处理的同种异体肌腱组：偶见腱细胞，未见到新生的细胶原原纤维，粗胶原原纤维排列紊乱、疏松。

Fresh allograft group: No tenocyte, and few new collagen fibril could be seen, thick collagen fibril arranged at random and loose.

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深创面组圆锥体结构消失，并被大量堆积、没有特定方向、排列紊乱的胶原纤维束充盈。

But the skin conical structure could not be found in deep wound groups, and the wounds were filled by a large accumulation of disarrayed and irregularly arranged collagen fibers.

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结果表明，造成碳纤维力学性能低的直接原因可以归结为严重的皮芯结构、芯部组织疏松或有孔洞出现、晶相少且无明显取向、石墨层排列紊乱。

The results demonstrate that the carbon fibers which have serious skin-core structure, few graphite layers which intricately piled up have low mechanical properties.

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