a British test, now called ‘A2 Key’, that measures a person’s ability to speak and write English as a foreign language at a basic level (the abbreviation for ‘Key English Test’) 英语入门考试，剑桥英语第一级认证（全写为 Key English Test，现称 Cambridge English: Key，英国考试，检测英语作为外语者的初级口语和写作能力）