range of variation短语¹⁴⁴⁹⁷²⁺² 基本例句 变化幅度 The progenies of the crosses between apples and crab apples showed a fairly wide range of variation for winter hardiness. A larger number of the progeny seedlings were cold resistant. 本文系统总结了大苹果与小苹果杂种一代在抗寒力、果实大小、品质、贮藏力和成熟期等方面的遗传倾向； cnki