Bigger worms tend to live longer because they can dig deeper, and avoid temperature extremes, soils that are too wet or dry, snow and predators. 较大的蚯蚓会活得较久,因为它们能钻得深一些,避免了温度忽高忽低、土壤过湿或过干,也避免了雪暴和食肉动物(的伤害)。
Comparing with changes of the amount of runoff of the Yellow River in history during several main wet and dry periods, it is correspondence to the periods of less and more amount of ice and snow of the South Pole respectively. 对照历史上黄河径流量变化的几个主要丰、枯阶段,都分别与南极冰雪量的偏少期和偏多期相对应。