我们都熟悉物质的三态。

We are all familiar with the three states of matter.

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由此，作者提出了三态相互平衡的理论，并阐述了实现三态平衡的途径。

Therefore, the author raises a theory on the three condition balance, and expounds the way to realize the balance of the three conditions.

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在此基础上，建立了系统在正弦波、三态方波输入下的驱抖模型，分析了输入信号参数的改变给系统响应带来的影响。

After that, the drive models of sine wave and three-state square wave were established, and the impact which caused by changing the parameters of the input signal was studied in this paper.

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There's the water phase, there's the ice cube is the solid phase, and there's some water, gas, vapor, and that's one bar.

里面放一块冰，这是固态；,于是我们得到了水，冰和水蒸气三态共存的点。

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