王位继承人的英文：
the heir to the throne

参考例句：

The successor to the throne
王位的继承人

An heir to the throne
王位的继承人

The Prince of Wales,ie(in Britain,the title often given to the heir to the throne)
威尔士王储(英国常授予王位继承人的封号).

It's only the second time a potential heir to the throne has married a commoner.
一位可能的王位继承人与平民缔结婚约，这种事还只是第二次。

Charles:The eldest son of Elizabeth II and heir to the British throne. He was invested as Prince of Wales in 1969.
查尔斯:伊丽莎白二世长子和英国王位的继承人。1969年被确立为威尔士亲王。

Emperor of Rome(a.d.14 - 37.Chosen by Augustus to be heir to the throne,he was a suspicious,tyrannical ruler.
泰比里厄斯罗马皇帝(公元14－37年)，被奥古斯特选作王位继承人，是一位多疑的暴君

heir是什么意思：
n. [C]
1.继承人；嗣子(+to)
2.（传统、才能、性格等的）继承者(+to)

He wanted to beget an heir.
他想生个子嗣。

He proclaimed Charles his heir.
他宣布查尔斯为他的继承人。

To be the heir to ancient sages and the teacher of posterity
承先启后

She made her stepson heir.
她让继子做自己的继承人。

They have to make the bed and clean heir room.
他们必须要铺床和打扫房间。

throne是什么意思：
n. 御座，宝座；王位，王权，帝位

The throne was footed with gold.
这御座是用黄金做的脚。

He will succeed to the throne.
他将继承王位。

The prince acceded to the throne.
太子继承了王位。

He tempted to legitimate the accession to the throne.
他努力使登王位合法化。

He renounced all rights to the throne.
他正式同意放弃王位的权利。