• 1mass noun The chemical element of atomic number 6, a non-metal which has two main forms (diamond and graphite) and which also occurs in impure form in charcoal, soot, and coal.

  （化学元素）碳（符号： C ）

  Example sentencesExamples

  • The light elements such as hydrogen, carbon, nitrogen, and oxygen are especially plentiful in space.
  • The biosphere consists of six main elements: carbon, nitrogen, phosphorus, sulphur, oxygen, and hydrogen.
  • Combustion, or burning, is a chemical process involving carbon, hydrogen and oxygen.
  • Then again, a diamond is only carbon (with a skin of hydrogen, one molecule thick): why shouldn't it be almost as combustible as coal?
  • Every source of soot, every fuel and means of burning it, has its own ratio of soot to organic carbon; few have yet been analyzed.
  • It is composed mostly of isotopes of hydrogen and helium and includes 60 other elements including neon, argon carbon, nitrogen, oxygen and iron.
  • Proteins are composed of carbon, hydrogen, oxygen, and nitrogen; it is the presence of the last of these which distinguishes proteins from the other materials of life.
  • After running his models, Saumon concluded that in Saturn, heavy elements like iron, silicon, carbon, nitrogen and oxygen are concentrated in the core of the planet.
  • The plan is that these will determine the abundance and stable isotopic compositions of elements such as hydrogen, carbon, nitrogen and oxygen.
  • On the Earth, it is found only in combination with other elements, such as oxygen, carbon, and nitrogen.
  • The action of the micro-organisms will reduce the nitrogen, carbon and phosphate levels of the dam.
  • The ozone depleting compounds contain combinations of the elements chlorine, fluorine, bromine, carbon and hydrogen.
  • The search for life focuses mostly on planets with liquid water, a heat or energy source, and chemicals like carbon, hydrogen, and oxygen.
  • The amount of carbon in the coal will combine in combustion with oxygen, and it has to go somewhere.
  • One possibility of this sort of manipulation could turn carbon into either graphite or diamond.
  • Most plants live with their heads above ground, where they pick up carbon, hydrogen and oxygen floating in the air.
  • Silicon reacts chemically like carbon although it does not form multiple bonds.
  • We know that the Moon is low on certain chemicals such as hydrogen and carbon.
  • Consider the top five constituents of the cosmos, in order of their abundance: hydrogen, helium, oxygen, carbon, and nitrogen.
  • For common cast iron, the main elements of the chemical composition are carbon and silicon.

  1. 1.1usually as modifier Carbon fibre.
     碳纤维
     a bike with a carbon frame

     车身为碳纤维的自行车。

  2. 1.2count noun A rod of carbon in an arc lamp.
     （弧光灯的）炭精棒
     Example sentencesExamples

     • By the 1970's there was no longer a source for the 2 1/2 inch carbons that were required for this light.
     • The carbons last approximately 2 hours and then are replaced.
  3. 1.3count noun A piece of carbon paper or a carbon copy.
     复写纸；副本
     Example sentencesExamples

     • Also, because the operator making the observation actually does the input, errors caused when someone misinterprets values on poor-quality carbons or misunderstands fine shades of meaning are eliminated.
     • This was in the good old days when you drew your layouts on a massive piece of grid paper outfitted with a carbon layer so there were three copies.
     • Luckily, her maid had written receipts and kept the carbons.
     • The first samizdat were typed carbons, definitely not books, just as the Samizdat you are holding now is definitely not the usual literary journal.
     • Someone could go through your trash to find discarded receipts or carbons and use them to learn your account numbers.
     • All copies either had to be produced with carbons or on ‘skins’ fed through the temperamental duplicator.
     • They glide their tracing wheels (used in sewing) over the top of the carbons.
     • If there is a carbon, also ask for that from the clerk and shred it when you go home.
     • Customers were told to keep their carbons so the account number could not be reused.

     Synonyms

     copy, reproduction, duplicate, photocopy, mimeograph, mimeo, replica, likeness, carbon copy, print, reprint, offprint, image

• 2Carbon dioxide or other gaseous carbon compounds released into the atmosphere, associated with climate change.

  （排放到大气层的）二氧化碳（或其他气态碳化合物）

  the level of carbon in the atmosphere has been consistently rising

  大气层中二氧化碳的含量一直在增加。

  as modifier fossil fuel consumption and carbon emissions continued to rise

  矿物燃料的消耗和碳排放继续在增加。

  Example sentencesExamples

  • This litter decomposes more slowly, resulting in a higher carbon accumulation rate.

Compounds of carbon (organic compounds) form the physical basis of all living organisms. Carbon atoms are able to link with each other and with other atoms to form chains and rings, and an infinite variety of carbon compounds exist