“grade of coal”的概念、定义、翻译、参考文献-科学参考

单词	grade of coal
释义	grade of coal [¦grād ǝv `kōl] ^{MINING ENGINEERING} A classification of coal based on the amount and nature of the ash and sulfur content.
随便看	pharmacotherapy pharmacy pharyngeal aponeurosis pharyngeal bursa pharyngeal cleft pharyngeal plexus pharyngeal pouch pharyngeal tonsil pharyngeal tooth pharyngitis Pharyngobdellae pharyngology pharyngoscope pharynx phase phase advancer phase age phase-alternation line system phase angle phase-angle meter phase-balance relay phase behavior phase boundary phase change phase-change coefficient

科学参考收录了103327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。