This involves stimulating both the left and right sides of the heart, in order to synchronise their contraction.That, in turn, improves the pumping action.
2
此类治疗通过对心脏左右两部分的刺激来实现二者的同步收缩，进而改善心跳。
This involves stimulating both the left and right sides of the heart, in order to synchronise their contraction. That, in turn, improves the pumping action.
3
胎儿时期的心脏在怀孕后22天左右后开始跳动。
The embryonic heart starts to beat around the 22nd day of pregnancy.
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