一旦螺旋形隔板下降不全，主动脉和肺动脉干的血流将不能分开。

When the spiral septum fails to completely descend, the aortic and pulmonic trunks are left undivided at their outflow.

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一旦螺旋形隔板下降不全，主动脉和肺动脉干的血流将不能分开。

When the spiral septum fails to completely descend, the aortic and pulmonic trunks are left undivided at their outflow.

youdao