For improving network control performance, it's necessary to research some key problems in design process of passenger car network control system including system layer and node layer.

客车网络控制系统设计过程中需要对系统层与节点层的一些关键问题进行研究，以助于提高网络控制的性能。

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The drug works by hitting a key growth-promoting node involved in cell growth called mTOR that may go out of control in neuroendocrine cancers.

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