| 词汇 | carbon |
| 词根词缀 | 词源： 1789, coined 1780s in Fr. by Lavoisier as charbone, from L. carbo (gen. carbonis) "glowing coal, charcoal," from PIE base *ker- "heat, fire, to burn" (cf. L. cremare "to burn;" Skt. krsna "black, burnt," kudayati "singes;" Lith. kuriu "to heat," kartas "hot," krosnis "oven;" O.C.S. kurjo "to smoke," krada "fireplace, hearth;" Rus. ceren "brazier;" O.H.G. harsta "roasting;" Goth. hauri "coal;" O.N. hyrr "fire;" O.E. heorð "hearth"). Carbon 14, long-lived radioactive isotope used in dating organic deposits, is from 1936. Carbon dating (using carbon 14) is recorded from 1958. Carbon cycle is attested from 1912. Carbon footprint was in use by 2001. Carbon paper (soon to be obsolete) is from 1895. 词根记忆： n. 碳The career carpenter put the cargo on the carbon carpet.职业木匠把货物放到碳质地毯上. |
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