If it is merely less than at any nearby point, it is a relative, or local, minimum.
如果仅仅小于附近任一点的值，那它就是相对的，或者说是局部的极小值。
Second, the initial point and transfer time are same for different object relative orbit, and the minimum consumption of fuel is proportional to the expansion deflection.
不同膨胀系数时施加脉冲的时刻不变，最优的燃料消耗与膨胀变化量成正比；
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