Initials which stand for ‘before present’ and relate to dates before the present day (taken conventionally to be 1950). The term should not be confused with ‘bc’, which relates to dates prior to the birth of Christ.
科学参考收录了60776条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。