In transportation networks, a transshipment node with flow demands fails to conform to flow conservation, and can not be categorized to a source, a sink or an intermediate node.
运输网络中有流量需求的转运结点不遵从流量守恒条件，也不能按源、汇及中间结点归类。
If energy were to flow spontaneously from a block of ice to a surrounding volume of water, this could occur in complete accord with energy conservation.
如果能量能自发地从冰块扩散到周围的水中，这种现象的出现就完全符合能量守恒。
The mass conservation equation, energy conservation equation, flow equation and heat transfer equation are described in this paper.
列出了描述蒸汽发生器模型的质量、能量守恒方程以及流量方程和传热方程。
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