But unlike cells in other organs, our heart cells do almost all of their dividing during fetal development.

但与其他器官的细胞不同，心脏细胞几乎在胚胎发育时期就分化完了。

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Transparent imaging could display the inner structures of most solid or hollow organs, fetal spine and ribs could be shown completely and continuously;

三维超声透明成像可立体地显示实质性脏器内部结构的空间位置关系，胎儿的脊柱、肋骨等结构可完整连续显示；

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