The major function of this drug is to dilate coronary arteries.
它的主要作用是扩张冠状动脉。
What's more, their smaller coronary arteries-the twigs on the arterial tree-can fail to dilate when they should, further restricting blood flow.
而且她们细小的冠状动脉血管，就是主动脉树上的分枝，在需要的时候很难被扩大，更加限制了血流。
What's more, their smaller coronary arteries-the twigs on the arterial tree-can fail to dilate when they should, further restricting blood flow.
而且她们细小的冠状动脉血管，就是主动脉树上的分枝，在需要的时候很难被扩大，更加限制了血流。
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