合理的制度的英文：
rational system
system是什么意思：
n. 体系，系统；设备；制度；方法；身体；次序
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Is the system unstable?
是系统不稳定吗？
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It was not a perfect system.
它不是一个完美的系统。
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This is a sexpartite system.
这是一个由六部分组成的系统。
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Anatomically, the nervous system is divided into the central nervous system and the peripheral nervous system.
解剖学上把神经组织分为中枢神经系统和周围神经系统。
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disaccord between the economic system and political system
经济体制与政治体系间的不协调
