successor
n
~ (to sb/sth) person or thing that comes after and takes the place of (sb/sth) 接替的人或事物; 後继者; 继任者; 继承人
the successor to the throne 王位的继承人
appoint a successor to the headmaster 任命继任校长
This car is the successor to our popular hatchback model. 这种汽车是我厂著名的带上掀式斜背小轿车的换代产品. Cf 参看 predecessor.