evolutionary ladder短语¹¹⁴⁴⁶⁷⁺⁴ 基本例句 进化阶梯 Before lessons can be drawn from critters perched on the lower rungs of the evolutionary ladder, their behaviour must first be understood. 想要从低等生物上获得研究结果，首先得了解他们的行为。 ecocn Not every consumer will go all the way up this evolutionary ladder. 并不是每个消费者完全一致地认可这个“进化途径”。 yeeyan