“有效能赤字”概念、定义、翻译-科学时代

单词	有效能赤字
释义	商务词汇手册有效能赤字 virtuous deficit
随便看	age class age-class method age-class period age-class space age-class table age-class-transition probability age-class vector age cohort age cohort age-cohort tendency age composition age composition age composition age composition age composition age composition age composition aged aged aged beef aged cheese aged core aged dependency ratio age-dependency ratio age dependent birth and death process

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。