Past events which play no part in rational present decision-making. For a firm, bygones include sunk costs and past operating profits and losses, except to the extent that these play a part in forming present expectations.
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。