“maternal mortality ratio”的概念、定义、翻译、参考文献-科学参考

单词	maternal mortality ratio
释义	maternal mortality ratio Encyclopedia 医学人口统计指标释 maternal mortality ratio孕产妇死亡率某地区某年育龄妇女从妊娠期至产后42天内，由于妊娠或妊娠处理有关的原因导致的死亡人数与该地区同年出生的活产数之比，不包括意外原因死亡的孕产妇数。
随便看	spectral power spectrum spectral problem spectral process spectral projections spectral projector spectral property spectral purity spectral radiance spectral radiant emissivity spectral radiant emittance spectral radiant energy spectral radiant energy density spectral radiant exitance spectral radiant flux spectral radiant intensity spectral radiant power spectral radiant power calibration spectral radiant power responsivity calibration spectral radiation spectral radiometric calibration spectral radius spectral radius of a matrix spectral range spectral reconstruction spectral reflectance standard

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。