天子的英文：
a Son of Heaven

参考例句：

A monarch behind closed doors—authority narrowly confined
闭门天子

Back,they have their audience with the Khan in the hall
归来见天子，天子坐明堂

The plan was to have an audience of the son of Heaven.
计划里是有觐见天子的环节的。

The feudal lords themselves stood in a position of being either major or minor descendants of the Zhou emperor
诸侯对于周天子，是小宗跟大宗的关系

son是什么意思：
n. 儿子；年轻人，孩子；男性后裔，子孙；圣子

The plan was to have an audience of the son of Heaven.
计划里是有觐见天子的环节的。

Where are you from, my son?
小兄弟，你是哪里人？

The child is a treasure of a son.
那孩子是一个宝贝儿子。

His son is on his right.
他的儿子在他右边。

Her son died on the battlefield.
她儿子死在战场上。

heaven是什么意思：
n. 天堂；上帝；天；极乐

It was the will of Heaven.
这是天意。

the seventh heaven
极乐

The plan was to have an audience of the son of Heaven.
计划里是有觐见天子的环节的。

Marriages are made in heaven
姻缘天注定

Heavens here is plural.
这里的天这个名词用的是复数形式。