| 词汇 | elastic |
| 词根词缀 | 词源： elastic (adj.) 1653, coined in Fr. (1651) as a scientific term to describe gases, from Gk. elastos "ductile, flexible," related to elaunein "to strike, beat out," of uncertain origin. Applied to solids from 1674. The noun, "cord or string woven with rubber," is 1847, Amer.Eng. 词根记忆： a. 弹性的n.松紧带,橡皮圈The rules are elastic.这些规章是有弹性的. |
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