optional succession

• 任意继承

optional succession的用法和样例：

例句

1. Succession begins at the death of a citizen.
   继承从被继承人死亡时开始。
2. His succession was disputed between his sons Bayezid and Cem.
   他的儿子们巴耶济德与杰姆为了继承问题闹的不可开交。