| 词汇 | calculus |
| 词根词缀 | 词源： 1666, from L. calculus "reckoning, account," originally "pebble used in counting," dim. of calx (gen. calcis) "limestone." Modern mathematical sense is a shortening of differential calculus. Also used from 1732 to mean "concretion occurring accidentally in the animal body," as dental plaque, kidney stones, etc. |
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