This dissertation designs a service time-space network combined with train formation plan and train schedule for the first time, which makes for modeling dynamic empty car distribution.

首次提出了融合列车编组计划和列车运行图的服务时空网络概念，为研究动态空车调配问题提供了一种有效的技术手段和建模方法。

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We are a very dynamic company and want to have dynamic people. No previous dental knowledge is required. We will train you; you just have to like to work!

我们的企业活力充沛，希望拥有动力十足的员工。您无需拥有牙科专业知识，我们将为你提供培训；您只需要喜欢这份工作即可！

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The dynamic behaviors of encased differential gear train had been systematically re- searched.

深入地研究了单环路封闭式行星齿轮传动系统的动态特性；

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