n.四倍
動詞quadruple現(xiàn)在分詞形式.
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)量甚至多達四倍。
