“non-negative characteristic form”概念、定义、翻译-科学时代

单词	non-negative characteristic form
释义	数学词汇手册 non-negative characteristic form 非负特征型［形式］
随便看	active ingredient active ingredient active input lesson active in service active intellect active international balance of payment active inventory active investing active investment active ion active labour force active language knowledge active lattice active law active layer active layer active layer active layer active layer active leakage control active learning active learning active learning concept active learning rate active learning time

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。