“betterment and reconstruction of existing railway”的概念、定义、翻译、参考文献-科学参考

单词	betterment and reconstruction of existing railway
释义	betterment and reconstruction of existing railway Encyclopedia 工学铁路选线设计释 betterment and reconstruction of existing railway既有线加强与改建对运营铁路进行技术改造。通过提高既有铁路的输送能力、列车运行速度，降低运输成本，以适应经济社会发展所带来的铁路运量的快速增长以及旅客对运输质量的更高要求。
随便看	least square method least square min-norm estimation least squares least squares approximation least squares estimate least squares estimation least squares estimator least squares fitting least squares identification least squares image matching least squares method least square solution least squares principle least squares problem least squares solution least time path least universal exponent least upper bound least value least-value problem least water lily least work leather leatherback turtle leather coating

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