| 词汇 | bluegrass |
| 词根词缀 | 词源： music style, 1958, in allusion to the Blue Grass Boys, country music band 1940s-'50s, from the "blue" grass (Poa pratensis) characteristic of Kentucky, the grass so called from 1751. Kentucky has been called the Bluegrass State since at least 1872. |
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