铅存在于自然界中,如今大多数铅的发现都是与人的活动相关联的。弃用的铅或者遗失的铅坠,入水后会被鱼类、鸟类以及依靠水存活的哺乳动物所吸收,最终导致铅中毒、贫血、肌肉麻痹,同时对神经系统、肝脏以及肾脏造成伤害。 Lead is found in nature, and most lead discovery today is associated with human activity. Abandoned lead or lost lead pendants can be absorbed by fish, birds and mammals that depend on water for survival, eventually leading to lead poisoning, anemia and muscle paralysis, as well as damaging the nervous system, liver and kidneys.