三十的英文是 thirty.
例句:
By sunset we had covered thirty miles.
到日落时我们已走了三十英里。
Some thirty people attended the funeral.
大约有三十人参加了葬礼。
相关介绍
She thinks nothing of walking thirty miles a day.
她认为一天步行三十英里不足为奇。
She's in her mid-thirties—thirty-six to be exact.
她三十五岁左右—确切地说是三十六岁。
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。


