elastic /iˈlæstik/ I. adj. 1.有弹性的：elastic bands 橡皮筋，松紧带 Rubber is elastic. 橡胶具有弹性。2.灵活的：people with elastic disposition 具有灵活气质的人 My plans are fairly elastic. 我的计划还算灵活。‖II. n. ［u］弹性织物 ：a piece of elastic 一条松紧带(一根橡皮筋)
elasticity /ilæˈstisiti:, ˌi:læ-]/ n. [u] 弹性，弹力；灵活性，伸缩性：elasticity of demand需求的伸缩性The skin eventually loses its elasticity.皮肤最终会失去弹性。
