“three mandatory training”的概念、定义、翻译、参考文献-科学参考

单词	three mandatory training
释义	three mandatory training Encyclopedia 法学民警训练释 three mandatory training“三个必训”制度公安民警首任和上岗必训，职务和警衔晋升必训，基层和一线民警每年实战必训的制度规定。
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科学参考收录了854744条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。