It refers to the characteristic that the shape of an object changes after being subjected to an external force, and can recover its original shape if the force is removed. [1]
Xu Chi "Bridgehead of Han River": "Countless workers, carrying flexible poles on their shoulders, carry two baskets of yellow mud and run back and forth." Ru Zhijuan Tall Poplar on the Socialist Track: "The train runs smoothly with a slight and elastic jump." Hu Shi March 4 of This Week: "It is a great liberation to change the educational system from rigid to flexible." Wen Yiduo Mythology and Poetry: Historical Trend of Literature: "Poetry has the advantage of infinite elasticity, becoming infinite patterns and containing infinite content." [1] 
