expectant heir

例句：

1. 1. The family is expecting a new baby soon.
   这个家庭很快就要迎来一个新宝宝了。
2. 2. He was the expectant heir to his father's business empire.
   他是他父亲商业帝国的继承人。
3. 3.She was the expectant heir to her late mother's legacy.
   她是她已故母亲的遗产的继承人。