Because you have lots of blood vessels, your body can handle a couple superficial veins scarring over.

因为你有很多血管， 你的身体可以处理几条疤痕的浅表静脉。

So, we put a knee brace on the leg to stabilize it and then eventually the ligament will scar over and they don't need surgery at all.

我们在腿上放一个膝盖支架来稳定它，最后韧带会结疤，根本不需要手术。

Dermabrasion uses a gentle sanding tool to wear down layers of the skin that have scarred over from cystic acne, but it only works for people with lighter skin.

磨皮是用轻柔的打磨工具磨去因囊性痤疮留疤的皮肤层，但这只对皮肤薄的人有用。