grass roots
n.
1766, literally; figurative use from 1901 in sense "fundamental level;" U.S. political sense of "the rank and file of the electorate" is attested from 1912; also grassroots.
| 词汇 | grass roots | 
| 词根词缀 | Online Etymology Dictionary grass roots n. 1766, literally; figurative use from 1901 in sense "fundamental level;" U.S. political sense of "the rank and file of the electorate" is attested from 1912; also grassroots. | 
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