brachistochrone
柯林斯词典
1. N the curve between two points through which a body moves under the force of gravity in a shorter time than for any other curve; the path of quickest descent 最速降线[maths]
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1. N the curve between two points through which a body moves under the force of gravity in a shorter time than for any other curve; the path of quickest descent 最速降线[maths]