根据问题的实际意义，我们主要感兴趣的是系统在第一象限内的动力学行为。
Consider the actual meaning of the system, we are mainly interested in the dynamical behaviour of the system in the first quadrant.
没有理由假设，与完全就业一致的均衡利率，必须处于笛卡尔坐标平面的第一象限内。
There is no reason to presume that the equilibrium interest rate consistent with full employment is necessarily in the upper right quadrant of the Cartesian plane.
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