run-of-the-mill
adj.
"unspectacular," 1909 in a literal sense, in reference to material yielded by a mill, etc., before sorting for quality (compare common run "usual, ordinary type," from 1712). Figurative use is from 1922.
| 词汇 | run-of-the-mill | 
| 词根词缀 | Online Etymology Dictionary run-of-the-mill adj. "unspectacular," 1909 in a literal sense, in reference to material yielded by a mill, etc., before sorting for quality (compare common run "usual, ordinary type," from 1712). Figurative use is from 1922. | 
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