| 词汇 | polygraph |
| 词根词缀 | 词源： 1794, "mechanical device for making multiple copies of something written or drawn," from Gk. polygraphos "writing much," from polys "much" (see poly-) + graphos "writing," from graphein "to write." Meaning "instrument for recording several pulsations of the body at the same time" is 1871; first used as a lie detector 1921. |
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