Progressively increasing the amplitude leads to the bouncing period doubling then quadrupling. 假如逐漸增大振幅，水滴跳動的頻率將會加倍，繼而再變成四倍。
Rather than using energy for height, the stunted crops put it toward making grain instead, quadrupling production in some cases. 這些矮莖作物不把能量用來增高，反而用來制造更多種子，有時，產(chǎn)量甚至多達(dá)四倍。