a flexible rodlike structure that forms the supporting axis of the body in the lowest chordates and lowest vertebrates and in embryos of higher vertebrates
双语例句
用作名词 (n.)
Right now the notochord cell between vertebra is added gradually much. 此时椎间的脊索细胞逐渐增多。
When notochord organization is ceaseless and migratory, fiber annulus also increases. 在脊索组织不断迁移时，纤维环亦增大。
