“Twenty-one Demands”概念、定义、翻译-科学时代

单词	Twenty-one Demands
释义	历史学词汇手册 Twenty-one Demands 《二十一条》（1915）
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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。