久久国产欧美日韩精品_亚洲国产激情_精品一区二区三区四区_免费91_精品久久免费_97在线观_韩国午夜理伦三级在线观看按摩房

您好!歡迎訪問忙推網(wǎng)! 字典 詞典 詩詞

carbon

英 ['kɑ?b(?)n] 美['kɑrb?n]
  • n. [化學] 碳;碳棒;復寫紙
  • adj. 碳的;碳處理的
  • n. (Carbon)人名;(西)卡爾翁;(法)卡爾邦;(英)卡本

CET4TEM4考研TOEFLCET6中頻詞核心詞匯

詞態(tài)變化


復數(shù):?carbons;

中文詞源


carbon 碳

來自PIE *ker, 燃燒,詞源同cremate, hearth.

英文詞源


carbon
carbon: [18] The notion underlying carbon is probably that of ‘burning’; it has been tentatively traced back to a base *kar- ‘fire’. The word’s immediate source was French carbone, coined in the 1780s on the basis of Latin carbō ‘coal, charcoal’ (supplementing an earlier borrowing charbon ‘coal, charcoal’). It is not certain whether char and charcoal are related to it.
carbon (n.)
non-metallic element, 1789, coined 1787 in French by Lavoisier as charbone, from Latin carbonem (nominative carbo) "a coal, glowing coal; charcoal," from PIE root *ker- (4) "heat, fire, to burn" (cognates: Latin cremare "to burn;" Sanskrit kudayati "singes;" Lithuanian kuriu "to heat," kar?tas "hot," krosnis "oven;" Old Church Slavonic kurjo "to smoke," krada "fireplace, hearth;" Russian ceren "brazier;" Old High German harsta "roasting;" Gothic hauri "coal;" Old Norse hyrr "fire;" Old English heore "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.

雙語例句


1. In its untreated state the carbon fibre material is rather like cloth.
原始的碳纖維材料很像布料。

來自柯林斯例句

2. The two principal combustion products are water vapor and carbon dioxide.
兩種主要的燃燒產(chǎn)物是水蒸氣和二氧化碳。

來自柯林斯例句

3. In graphite sheets, carbon atoms bond together in rings.
石墨層中的碳原子相互連接形成碳環(huán)。

來自柯林斯例句

4. Mars has an insubstantial atmosphere, consisting almost entirely of carbon dioxide.
火星的大氣層極其稀薄,幾乎全部由二氧化碳構成。

來自柯林斯例句

5. Carbon dioxide is a necessary result of the oxidation of carbon compounds.
碳化合物氧化后必然會產(chǎn)生二氧化碳。

來自柯林斯例句

字典 詞典 成語 古詩 造句 英語
主站蜘蛛池模板: 天天干天天摸 | a级毛片免费播放 | 亚洲综合日韩中文字幕v在线 | 美女福利视频一区二区 | 精品在线视频播放 | 欧美精品第一区 | 久久这里只有精品免费播放 | 真实国产乱视频国语 | 日本黄色激情视频 | 欧美一级做一a做片性视频 欧美一级做一级爱a做片性 | 成人在线观看视频免费 | 中文字幕免费在线看线人 | 国产ww久久久久久久久久 | 精品无码中出一区二区 | 国产毛片在线看 | 亚洲天堂视频在线播放 | 人人看人人玩 | 久久狠狠婷婷丁香香蕉 | 人人香蕉 | 欧美亚洲国产一区 | 精品一区二区高清在线观看 | 美女久久久久久 | 免费视频二区 | 韩国三级高清手机在线版 | jizz日本处女 | 久久精品国产99久久3d动漫 | 日本一区视频在线播放 | 免费在线色 | 国产欧美中文字幕 | 国产成人久久 | 欧美做受 | 国产美女精品三级在线观看 | 精品成人 | 久久久综合九色合综国产 | 欧美一区二区视频在线观看 | 欧美视频精品一区二区三区 | 99久久精品国产9999高清 | 日日摸夜夜添夜夜添一区二区 | 欧美大片一区二区三区 | 另类三级| 精品亚洲成a人在线观看 |