“track maintenance”的概念、定义、翻译、参考文献-科学参考

单词	track maintenance
释义	track maintenance Encyclopedia 工学土木工程养护技术释 track maintenance轨道养护为保证列车安全、平稳、不间断运行而开展的各项轨道养护作业，包括轨道更新和经常性维修工作。
随便看	fractional D branes fractional D-branes fractional derivative fractional derivative and integral fractional differential fractional differential equation fractional differential integral equation fractional differential-integral equation fractional differential operator fractional differentiation fractional digit fractional dimension fractional distillation fractional divisor fractional drag fractional [electric] charge fractional electric charge fractional equation fractional equipment fractional equivalence fractional exponent fractional expression fractional factorial design fractional-factorial design fractional flow equation

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。