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)。