Veins are pretty important.
血管相当的重要N7+oURVo9%-R。
After all, they carry blood from various parts of the body to the heart.
毕竟，它们从身体的各个部分向心脏运输血液7vpUX)(ydqcXEeqd。
But for all their significance, veins are modest, too.
虽然很重要，但血管也很谦逊rka(hfOAOMm#Z,J9。
They are usually content to work behind the scenes, tucked away beneath the skin.
血管甘愿在幕后工作，在皮肤下默默运输血液&K^0mX-+OQ。

Sometimes, however, veins take center-stage and become visible as blue lines on the skin, often resembling an unmarked roadmap.
然而，有时候血管成为主角，在皮肤上可以看到蓝色的线，很像未被标记的地图&JoN^|bD6d;!yY。
If you haven't guessed by now, we're talking about varicose veins.
如果你还没有猜到，我们讨论的正是静脉曲张的血管nEw@!FuM=,Sz。
Have you ever wondered what are they are and how they form?
你是否想知道它们是什么并怎样形成的？
Basically, a varicose vein is one that is twisted and filled with backed-up blood.
通常，静脉曲张的血管充满回流的血液并因此扭曲lJbH!)ruugt7s*h。
Although they most commonly occur in the legs, varicose veins can also happen in the esophagus, testes and the urinary bladder.
它们不仅多见于腿部，也会表现在食管、睾丸、膀胱上Ryi!)|u.tS@iq@J。

译文为可可英语翻译，未经授权请勿转载!