/eɪ ˈes levl ||; e ˈɛs lɛvḷ/noun [C,U] Advanced Subsidiary (level); a British exam usually taken in Year 12 of school or college (= the year before the final year) when students are aged 17. Together with A2 exams, AS levels form A levels, which are needed for entrance to universities 高级补充程度考试（英国十二年级，即毕业前一年，学生17岁时参加的考试。AS级考试与A2级考试一起构成高级程度考试，是上大学必不可少的）: She's doing an AS (level) in French. 她在准备参加高级补充程度法语科考试。 ☞Look at A2 (level). 参看 A2(level)。