/ˌbi: ˈsi: ||; ˌbi ˈsi/abbr
before Christ; used in dates to show the number of years before the time when Christians believe Jesus Christ was born 公元前;纪元前:
300 BC公元前300年☞Look at AD. 参看 AD。
BC/͵bi ˋsi; ˌbiː ˈsiː/adv before Christ used after a date [→ AD] 公元前: 2600 BC 公元前 2600 年
BCabbreviation‘BC’ in a date shows it was before Christ was born: Julius Caesar died in 44 BC.Look at AD.