devolve on/upon
1. 被移交; 被转移
When the President is ill, his duties devolve upon the Vice-President.
当总统生病时, 其职务交由副总统代理。
devolve to
1. 转让; 被继承
The house will devolve to his daughter.
房屋将由他女儿继承。
习惯用语devolve on to sb.1.将(工作)交待给某人, 交由某人接替devolve upon to sb.1.将(工作)交待给某人, 交由某人接替