“average cost”概念、定义、翻译-科学时代

单词	average cost
释义	教育学词汇手册 average cost 平均成本
随便看	driller driller driller driller drill furrow drill hammer drill hoe drill hole drill hole drill hole drilling drilling drilling drilling drilling drilling drilling-and-blasting drilling distance drilling fluid drilling fluid drilling jumbo drilling machine drilling machine drilling machine drilling meal

科学时代收录了1160609条科普词条，基本涵盖了常见科普常识及英语词汇的翻译，是科学学习和研究的有利工具。