characteristics and cause

• 特点和原因

characteristics and cause的用法和样例：

例句

1. Treatment depends on the severity and cause of the hydronephrosis.
   治疗方法依据肾盂积水的严重程度和原因而采取不同的方法。
2. It is not difficult for people to relate the result to the cause.
   人们要把结果和原因联系起来并不困难。