三十的英语怎么说怎么读

"Thirty" in English is pronounced as /ˈθəːti/. It comes from the Old English word "þrītiġ" which means "three times ten".
Example sentences:
He's thirty years old.
There are thirty students in the class.
We have to pay thirty dollars for the ticket.
Translations:
他三十岁。
这个班有三十个学生。
我们需要付三十美元票价。