Time regarded as a coordinate dimension and required by relativity theory, along with three spatial dimensions, to specify completely the location of any event.
第四维，第四元：在相对论中指时间，同其它空间三维一起来确定任何一事物的位置。
Conclusion The three dimension reconstruction method presented by this paper is effective to reconstruct brain nuclei and is helpful to identify precisely shape and location of brain nuclei.
结论三维重建方法对脑内神经团的三维重建切实有效，有助于对脑内神经核团形态位置的精确研究。
Conclusion The three dimension reconstruction method presented by this paper is effective to reconstruct brain nuclei and is helpful to identify precisely shape and location of brain nuclei.
结论三维重建方法对脑内神经团的三维重建切实有效，有助于对脑内神经核团形态位置的精确研究。
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