伸腹：原句为使肚脐向脊椎贴近。
材料与方法：15例脊椎转移瘤原发灶经病理证实。
Materials and Methods: 15 patients with primary tumor were verified by pathology.
结论：人工椎体置换植骨术治疗脊椎原发良恶性肿瘤及椎体单个转移灶不失为一良好替代和重建方法。
Conclusion: Artificial vertebral body replacement and auto bone grafting for the patients with spinal tumor provides a valuable alternative measure for spinal reconstruction.
方法对53例经临床获得证实的脊椎转移瘤ct和X线表现进行分析，以总结其原发瘤与转移部位之间的影像学特征。
Methods the ct and X-ray expression of 53 cases of spine metastatic carcinoma were analyzed and summarize imaging character of them.
原肠作用是脊椎动物早期胚胎发育的关键事件。
Gastrulation is an essential event during early embryo development.
原肠作用是脊椎动物早期胚胎发育的关键事件。
Gastrulation is an essential event during early embryo development.
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