Lead causes brain damage by mimicking helpful metals found naturally in the body, such as calcium, iron and zinc, and binding with the same molecules and proteins.
通过模拟有助人体、自然存在的金属元素，诸如钙、铁、锌，并结合相同的分子与蛋白质，铅会导致大脑损伤。
2
Calcium leaks into muscle cells, binding to proteins which are in charge of muscle contraction.
钙会渗入肌肉细胞中和控制肌肉收缩的蛋白质结合。
3
Many developmental and environmental signals are transduced through changes in intracellular calcium concentrations, yet only a few calcium-bindingproteins have been identified in plants.