“煤级”的概念、定义、翻译、参考文献-科学参考

单词	煤级
释义	煤级 Encyclopedia 理学煤成因释 coal rank煤级煤化阶段或煤的变质阶段。 Chemistry ＞能源化学＞煤＞释义 coal rank煤级
随便看	axiom of ordered pair axiom of pairing axiom of parallelism axiom of parallels axiom of planes axiom of position axiom of power set axiom of power-set axiom of projective determinacy axiom of projective determinacy (PD) axiom of rational behavior axiom of reducibility axiom of regularity axiom of regularity; axiom of foundation axiom of replacement axiom of restriction axiom of separation axiom of subsets axiom of substitution axiom of sum-set axiom of syllogism axiom of symmetry axiom of the empty set axiom of the power set axiom of the sum set

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。