图上发生分叉处的点叫分支点，它相当于荷载的临界值。
The point at which branching of the graph occurs is called a bifurcation point and corresponds to a critical value of the load.
图上发生分叉处的点叫分支点，它相当于荷载的临界值。
The point at which branching of the graph occurs is called a bifurcation point and corresponds to a critical value of the load.
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