三十用英文怎么说读音

"三十" (sān shí) 用英语读作 "thirty"，读音为 [ˈθəː(r)ti]。这个词来源于古英语中的 "þrittig"，它是由 "þritti-" (三个)和 "-tig" (十)构成。

例句：

I'm thirty years old. (我三十岁了。)
She'll be thirty next month. (她下个月就三十岁了。)
The fpght leaves at thirty past seven. (航班在7点半起飞。)