ordinary grade
noun /ˈɔːdnri ɡreɪd/
  /ˈɔːrdneri ɡreɪd/
(also O grade)
 [countable, uncountable]- (in Scotland in the past) an exam in a particular subject, at a lower level than Highers, usually taken at the age of 16. In 1988 it was replaced by the Standard Grade.普通等级考试(苏格兰旧时的单科考试,低于高级考试,通常在 16 岁时参加。1988 年由标准等级考试取代)