1. The medication causes venodilation, which helps to reduce blood pressure.（这种药物引起静脉扩张，有助于降低血压。）
2. Venodilation occurs when the smooth muscles in the walls of veins relax, allowing the veins to expand and accommodate more blood.（当静脉壁的平滑肌松弛时，血管扩张发生，使得静脉能够扩展并容纳更多的血液。）