30的英语：thirty
thirty：
发音：英 [ˈθɜːtɪ] 美 [ˈθɜrti]
意思：n. 三十，三十个 adj. 三十的，三十个的
例句：
She's well over thirty, but still behaves as a child.
她三十好几岁了，行为举止还很幼稚。
The building was built about thirty years ago.
这幢楼建于约30年前。
She was driving at thirty.
她车速30码。
