Elasticity, also called relative derivation, is extensively applied in the activity of commodity economy , such as adjusting the demand with price.
弹性又称为相对导数，它在商品经济活动中有着广泛的应用，诸如用价格调节需求等。
2
On the basis of elasticity of the large-deflection thin penal, the method of weighted residuals is applied in calculating the stress and deflection of the curtain-wall glass.