音標：thirty 英[?θ?:ti] 美[?θ?:rti]

意思：n. 三十，三十個 adj. 三十的，三十個的

例句：

She's well over thirty, but still behaves as a child.

她三十好幾歲了，行為舉止還很幼稚。

The building was built about thirty years ago.

這幢樓建于約30年前。

She was driving at thirty.

她車速30碼。

擴展資料：

1~30的英文具體如下：

1~10:1: one 2: two 3: three 4: four 5: five 6: six 7: seven 8: eight 9: nine 10: ten

11~20：11: eleven 12:twelve 13:thirteen 14:fourteen 15:fifteen 16:sixteen 17:seventeen 18:eighteen 19:nineteen 20:twenty

21~30： 21:twenty-one 22:twenty-two 23:twenty-three 24:twenty-four 25:twenty-five 26:twenty-six 27:twenty-seven 28:twenty-eight 29:twenty-nine 30:thirty。