| 词汇 | pico- |
| 词根词缀 | 词源： 1915, adopted c.1952 as a scientific prefix meaning "one trillionth," from Sp. pico "a little over, a small balance," lit. "sharp point, beak," of Celtic origin (cf. Gaul. beccus "beak"). Picosecond first recorded 1966. |
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