nevus vascularis

例句：

1. 1.He noticed a small nevus on his arm that he had never seen before.
   他注意到他的手臂上有一个以前从未见过的小血管痣。
2. 2. The doctor removed the nevus from her neck and sent it for testing.
   医生从她的脖子上取出了那个血管痣，并把它送去测试。
3. 3.Nevus can be a cosmetic concern, especially if they are large or raised.
   血管痣可以是美容问题，特别是如果它们很大或凸起的话。