The gravity model has offered the frame of a general equilibrium, experimental, easy to grasp.
引力模型提供了一个实验性的、易于掌握的、一般均衡的框架。
Avoding this condition, we can change the integral cranks gravity center and realize stable equilibrium.
为避免此种状态的出现，可改变整体曲柄重心，实现稳定平。
Avoding this condition, we can change the integral cranks gravity center and realize stable equilibrium.
为避免此种状态的出现，可改变整体曲柄重心，实现稳定平。
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