由方程(2)-方程(1),你有c=g。這也就是說 D*c = D*g (也就是說這塊草每天生長的草可供一頭牛吃。方程(3)變成不等式 D*c
由方程(2)-方程(1),你有c=g。這也就是說 D*c = D*g (也就是說這塊草每天生長的草可供一頭牛吃。方程(3)變成不等式 D*c
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