“concrete operational stage”概念、定义、翻译-科学时代

单词	concrete operational stage
释义	心理学词汇手册 concrete operational stage 具体运思阶段，具体运算阶段
随便看	ultracentrifuge ultracentrifuge ultracentrifuge ultracentrifuge ultra-cheap money policy ultrachromatography ultra-clean ultra-clean air system ultra-clean air system ultra-clean coal ultra cleaner ultraclose-range photogrammetry ultra close-up ultracold freezer ultracold neutron ultraconservatism ultraconservative ultracryotomy ultracrystallite ultra damages ultrademocracy ultrademocracy ultradense neutron star ultradense object ultradistribution

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。