cir·ca /ˈsɜːkə $ ˈsɜːr-/ prepositionprep formal APPROXIMATELYused before a date to show that something happened close to but not exactly on that date 大约,左右〔用于日期前〕 SYN around manuscripts dating from circa 1100 写于约公元 1100 年的手稿
► see thesaurus at approximate circa• The manuscripts date from circa 1100 B.C.• a Robert Adam mansion, built circa 1778• The picture shows Tsar Nicholas, circa 1914.