a dilatation of blood vessels

• 血管扩张

a dilatation of blood vessels的用法和样例：

例句

1. A good warm-up dilates your blood vessels, ensuring that your muscles are well supplied with oxygen.
   充分的热身运动可以使血管扩张，保证肌肉得到充足的氧气供给。
2. During an attack, the blood vessels in the brain dilate and then draw together with stimulation of nerve endings near the affected blood vessels.
   当偏头痛发作，大脑中的血管扩张，然后由于神经的刺激而收缩，由此影响血管。