small cardiac vein

例句：

1. 1.The small cardiac vein is responsible for carrying blood from the heart to the lungs.
   小心脏静脉负责将血液从心脏输送到肺。
2. 2. During surgery, the surgeon carefully dissected the small cardiac vein to avoid damaging it.
   在手术中，外科医生小心地解剖小心脏静脉以避免损伤它。
3. 3.The patient's condition improved significantly after the treatment of the small cardiac vein.
   患者在接受小心脏静脉治疗后病情明显好转。