“down-ladder operator”概念、定义、翻译-科学时代

单词	down-ladder operator
释义	数学词汇手册 down-ladder operator 下降算子
随便看	star detector star dial star distribution stardom star drift star drill stare decisis stare decisis star effect star feeder star filter star finder star-finite covering starfish Starfish radiation belt starflex hub starflower star-formation activity star-formation burst star-formation process star-formation region star-forming phase star-forming region star fruit star fruit

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。