中学文凭 meaning in English

certificate of secondary education

They told me for years about the advantages of a college degree over a high school diploma
多年来他们一直对我讲大学学位如何胜过中学文凭。
Of the current actual establishment and promotion ratio of cms in government and aided secondary schools respectively
现时官立及资助中学文凭教师的实际编制及晋升比率分别为何
Of the reasons for the discrepancies , if any , between the figures given in the answer to and those given in the answer to above
若上文a项及b项答案所述的数字出现差异，其原因为何请胪列目前官立中学和资助中学文凭教师在