三十岁的英文：
thirty

参考例句：

He entered politics at the age of 30.
他三十岁开始从政。

Until I was 30 I was a vagabond.
三十岁之前，我还四处流浪。

He'll be an astronaut by the time he is thirty.
在他三十岁的时候他将成为一名太空旅行者。

youth culture
青年文化(多指三十岁以下的一代人倾向于接受的道德观念等)

Inside this husk there is a baffled man aged thirty
在这个臭皮囊里仍然活着一位不可思议的三十岁的男子。

Sime is not thirty years old, and Madeline's a luscious girl.
西姆还不到三十岁，梅德琳又是个娇艳的姑娘。

The formidable stroke of thirty died away with the reassuring pressure of her hand
她紧紧握住我的手，驱散了三十岁生日的巨大冲击。

Their 30 year-old son is just a leech, yet they continue to support him.
他们那个三十岁的儿子只是一个寄生虫，而他们还继续负担他的生活。

Finally, in 1850, when she was 30, her parents accepted her decision.
1850年她三十岁的时候，她父母终于接受了她的抉择。

"Their 30 years-old son is just a leech, yet they continue to support him."
〞他们那个三十岁的儿子只是一个寄生虫,而他们还继续负担他的生活。〞

thirty是什么意思：
n. 三十，三十个
adj. 三十的，三十个的

She's thirty now.
她今年三十岁了。

She has starred in some thirty films.
她主演过大约三十部影片。

She was coming at nineteen-thirty.
她会在十九点三十来。

It‘s nineteen-thirty now.
现在是十九点三十分。

The mountains rejoice in an average annual rainfall of thirty inches.
山区的年平均降雨量为30英寸。