30的英文怎么拼

30的英文：thirty；
例句：
He was struck down by cancer at the age of thirty、
他三十岁那年被癌症夺去了性命。
Only thirty students graduated in Chinese last year、
去年只有三十名学生获得汉语学士学位。

The driver was a trim young woman of perhaps thirty、

驾车者是一位大约三十来岁的、苗条年轻女子。

If I might hazard a guess , I'd say she was about thirty、

让我来猜的话，我说她大约三十岁。

Yesterday no fewer than thirty climbers reached the summit、

昨天不少于三十名登山者到达了顶峰。