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- elastic conszants 碘化钠
- It snapped back like a piece of elastic. 它像一条橡皮带那样迅速弹回。
- All elastic materials possess this property to a certain degree. 所有弹性材料在一定程度上都具有这种特性。
- Don't worry about him; he is a cheerful and elastic man. 别为他担心;他是个快活开朗的人。
- There was a loud ping as the elastic broke. 橡皮带断裂时发出砰的一声巨响.
- The safety helmet is held on by an elastic strap. 安全帽用一根松紧带系住。
- The slacks have an elastic waistband. 这条便裤的腰带可伸缩。
- An ankle-high shoe with elastic sides. 高帮松紧鞋两帮有松紧布且高至脚踝的鞋
- To bend(something pliant or elastic). 使（柔韧的或有弹性的东西）弯曲
- He is a cheerful and elastic man. 他是个快活开朗的人。
- He stretched the elastic out as far as it would go. 他把松紧带尽量拉长。
- These elastic bands have perished. 这些橡皮带已失去弹性。
- I'd rather wear braces, only the elastic perishes. 我倒宁愿系吊裤带，只不过因为橡皮筋坏得太快。
- Cut the elastic, leaving a 2.5 cm (1 inch) tail. 留2.;5cm余量剪断松紧带。
- Elastic expands when you pull it. 松紧带一拉就伸长。
- Outside the strip zone, deformation is elastic. 在窄带区以外，变形是弹性的。
- The demand for the product is elastic. 对这种产品的需求不是一成不变的。
- The elastic at the waist gives a nice snug fit. 腰间的松紧带使衣服正好紧紧贴在身上。
- This skirt needs some new elastic in the waist. 这条裙子需要换一根松紧腰带。
- The demand for public goods is elastic. 公共产品需求具有弹性。
