Clay and wax are plastic substances.

黏土和蜡是可塑性物质。

Plastic changes in nociceptive transmission may occur at the spinal cord as well as supraspinal structures after tail amputation.

这种长期性的变化可能是由于中枢神经系统的神经可塑性变化引的（从脊髓背角到皮层）。