区域产业结构平衡是暂时的、非稳态的。
The balance of regional industrial structure is temporary and unstable.
温度在结构内部的分布由多个变量决定，是一个非稳态的温度场。
The temperature distribution in the structure is decided by many variables and it is a transient temperature field.
汽车发动机经常在非稳态的过渡工况下工作，即启动、暖机、突加和突减工况。
The automobile engine is usually worked under non steady state of transient operating conditions, i. e. starting, warming, suddenly loading and unloading.
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