| 词汇 | overlay |
| 词根词缀 | 词源： overlay (v.) "to cover the surface of (something)," c.1300, from over + lay (q.v.). There also was an overlie (c.1175), but it had been merged into this word by 18c. The noun in the printing sense is attested from 1824; meaning "transparent sheet over a map, chart, etc." is from 1938. |
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