B.c.意思

"B.C." is an abbreviation that stands for "Before Christ." It is used to refer to years before the birth of Jesus Christ. The system of dating that uses B.C. and A.D. (Anno Domini, which means "in the year of the Lord") is known as the Christian era. The year 1 B.C. is the year before Jesus was born, and the year 1 A.D. is the first year of the Christian era.