“direction difference”概念、定义、翻译-科学时代

单词	direction difference
释义	信息与系统科学词汇手册 direction difference 方向差分
随便看	FOC (free of charge) FOC (free of charge) Foch，Ferdinand foco-collimator foco-collimator Focolare movement focometer focometer focometer focus focus focus focus focus focus focus focus focus focus focus focus focus focus focus focus

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。