🔑thirtyBrE/ˈθɜːti/NAmE/ˈθɜːrti/🔑number30三十nounthe thirties[pl.]numbers, yearsortemperaturesfrom30to39三十几;三十年代▸thir·ti·eth🔑BrE/ˈθɜːtiəθ/NAmE/ˈθɜːrtiəθ/ordinal number, nounHELP There are examples of how to use ordinal numbers at the entry for fifth.序数词用法示例见 fifth 条。●inyourˈthirtiesbetweentheagesof30and39 * 30 多岁