emissary veins

例句：

1. 1. The emissary veins were used to transport the precious metals from the mine to the city.
   这些特派员静脉用于将珍贵的金属从矿井运送到城市。
2. 2. The doctors had to perform complex surgeries on the patient's emissary veins to repair the damage.
   医生们不得不对患者的特派员静脉进行复杂的手术来修复损伤。
3. 3. The emissary veins are essential for the transportation of blood and other vital fluids throughout thebody.
   特派员静脉对于整个身体中血液和其他重要液体的运输至关重要。