“自定成本”概念、定义、翻译-科学时代

单词	自定成本
释义	商务词汇手册自定成本 discretionary cost
随便看	back back back back back abutment pressure backacter backacter backacter back action backactor back-alley news back and face effect back and fore back and fore ribs back-and-forth construction back-arc back-arc basin back-arc spreading back azimuth back backing backbar backbeach backbeach back beam back bearing

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。