Abbreviation for Back In The Day used in contributions to social media forums and in emails. Used to express nostalgia for a lost age: for example, ‘BITD when we used mainframes and there were no newsgroups whose members insulted each other.’
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。