英语语法分析

Periarteritis nodosa was a disease mainly characterized by necrosis of arteries.

结节性动脉周围炎是一种以动脉坏死为主要特征的疾病。

Results Periarteritis nodosa was mainly characterized by necrosis of arteries and arteritis with all the layers involved.

结果结节性动脉周围炎是一类以动脉坏死为主要特征、累及全层动脉的炎性病变。