vein rib

例句：

1. 1.He was having a hard time breathing because of his severe asthma.
   他因为严重的哮喘而呼吸困难。
2. 2.The doctor advised him to take medication for his condition.
   医生建议他服用药物来治疗他的病情。
3. 3. She felt relieved when she saw the blood vessels in her arm were no longer visible.
   当她看到手臂上的血管不再可见时，她感到松了一口气。