BC
(或B.C.)公元前(=Before Christ)
释义2：
BC
◙ for abbreviation before Christ (used to indicate that a date is before the Christian era)• 公元前（用于表示公元纪元之前的日期） British Columbia (in official postal use)• [邮] 同 British Columbia 【用法】
1. bc is normally written in small capitals and placed after the numerals, as in 72 bc not bc 72 --› compare
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