adventitious vein

例句：

1. 1. The doctor found a small adventitious vein in the patient's leg.
   医生在病人的腿上发现了一个小的辅助脉。
2. 2.This plant has several adventitious veins that can be used for medicinal purposes.
   这种植物有多个辅助脉，可以用于药用目的。
3. 3. In some cases, adventitious veins can be mistaken for cancerous growths.
   在某些情况下，辅助脉可能会被误认为是癌症生长。