Their thick, waxy skin reduces evaporation, their spines protect them from thirsty animals, and their deep or widespread root systems efficiently capture any available water.

它们厚厚的蜡质皮肤可以减少蒸发，它们的刺可以保护它们免受口渴的动物的侵害，它们的根系深厚或广泛，可以有效地捕获任何可用的水。