乳牛關節中的軟骨由於軟骨分子負電荷之間的排斥力，以及這些相同分子之間具有在壓力峰值附近的吸引力，可保護免受壓縮力的影響
(Cartilage in the joints of cows protect from compressive forces due to repulsion between negative charges of cartilage molecules, as well as attractive forces between these same molecules near the peak of the compressive force.)