“upgrade”的概念、定义、翻译、参考文献-科学参考

单词	upgrade
释义	upgrade [¦ǝp¦grād] ^{MINING ENGINEERING} 1. To increase the commercial value of a coal or mineral product by appropriate treatment. 2. To increase the quality rating of diamonds beyond or above the rating implied by their particular classification.
随便看	sericitic sandstone sericitization sericulture series series circuit series compensation series connection series decay series disintegration series excitation series-fed vertical antenna series feed series firing series generator series loading series modulation series motor series multiple series-parallel circuit series-parallel control series-parallel firing series-parallel switch wattless component wattless current wattless power

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。