刀划着螺旋形下降弧线，砍开一只斑溪的的肩膀。
It flutters off in a descending spiral, the shoulder of one wing hacked open.
他们的利润开始螺旋形地下降。
他们的利润开始螺旋形地急剧下降。
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.
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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