n.整形外科；外科修补术
名词plastic的复数形式.
Plastics have found wide applications in many ways: dishes for one, machine parts for another. 塑料在许多方面得到了应用：餐具是其中一例，机器部件是另一例。
It is their plasticity at certain temperatures that gives plastics their main advantage over many other materials. 正是在一定温度下塑料所具有的塑性使它比其他许多材料更优越。
