“1千克质量基准砝码”的概念、定义、翻译、参考文献-科学参考

单词	1千克质量基准砝码
释义	1千克质量基准砝码 Encyclopedia 工学质量计量技术释 national prototype of the kilogram1千克质量基准砝码中国在1965年从国际计量局得到砝码器号是60号的国家千克原器。
随便看	back-propagation algorithm back propagation network back propagation neural network back-propagation neural network back propagation of errors network back propagation，BP back reaction backreflection back reflective material backrope backsaw backscatter backscatter cross-section back scattered electron backscattered electron backscattered light backscatterer back scattering back-scattering backscattering backscattering analysis backscattering analysis, BSA back scattering-channeling effect back scattering method backscatter peak

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。