| 词汇 | carbon |
| 释义 | carbon noun uk /ˈkɑː.bən/ us /ˈkɑːr.bən/ carbonnoun (SUBSTANCE)B2[ U ] chemistry (symbolC) a chemical element that exists in its pure form as diamond or graphite, and is an important part of other substances such as coal and oil, as well as being contained in all plants and animals碳 [ U ] environment the gas carbon dioxide, which is the gas formed when carbon is burned or when people or animals breathe out: The prize will be awarded to a project that can draw at least one gigatonne of carbon a year from the atmosphere. Environmental campaigners are arguing for further cuts in carbon emissions. They used carbon dating tests to authenticate the claim that the skeleton was 2 million years old. The substance was identified as carbon. We need to switch to alternative energy sources that do not emit carbon into the atmosphere, such as hydro-electric power. Trees are able to absorb carbon from the atmosphere. Chemical elements actinium alkali metal americium astatine berkelium brimstone bromine calcium fluorine germanium iodine lithium manganese nickel plutonium quicksilver selenium sodium transition metal zinc You can also find related words, phrases, and synonyms in the topics: Environmental issues carbonnoun (DOCUMENT)[ C ] a carbon copy复写本 Copying and copies anti-counterfeiting anti-piracy ape biomimicry blueprint emulatively emulous emulously faux forge pattern yourself on someone/something photocopiable photocopy photostat photostatic transcript unduplicated virtualization warmed-over Xerox carbon | American Dictionarycarbon noun[ U ] us/ˈkɑr·bən/ biology, chemistry a chemical element that is contained in all animals and plants, and that is an important part of other substances such as coal and oil, and exists in its pure form as diamonds and graphite carbon | Business Englishcarbon noun uk /ˈkɑːbən/us [ U ] NATURAL RESOURCES a chemical element (= simple chemical substance), which exists in all plants and animals, and is an important part of coal and oil. When carbon is burned it produces carbon dioxide and carbon monoxide: All organic substances contain the element carbon. Carbon exists in its pure form as diamond or graphite. carbon atoms [ U ] ENVIRONMENT used as a short form for carbon dioxide, especially when talking about the environment and climate change: Car makers are already working hard on reducing carbon. The plan would remove two billion tons of carbon a year from the atmosphere. [ C ] WORKPLACE a carbon copy Examples of carboncarbon Decline in soil organic carbon and total nitrogen in relation to tillage, stubble management and rotation. The y-axis represents fraction total organic carbon remaining. The cost of replacing carbon by growing trees is so high primarily because of the opportunity costs of foregoing agricultural production on prime cropland. Finally, growing trees for energy would reduce another 2.2 tons of carbon per hectare in the village facility and 3.6 tons in the centralized facility. It makes nutrients available for growth of primary producers and it releases carbon dioxide to the atmosphere. Supply-side options are shown in the rows of table 1, and are put under two subheadings: carbon and carbon-neutral. Only in the case of carbon monoxide does this conclusion not seem to hold, possibly because mitigation measures are much more limited. Geochemical observations appear to mirror palaeontological data, thus possibly relating chemical changes within the carbon cycle to biotic evolution. If methane is a causal mechanism, the repetition of the negative carbon excursions could be accounted for by multiple releases of methane. Thus, elemental carbon was released from the electrodes during arcing. Reproducibility of replicate analyses of standards was generally better than 0.1 for both carbon- and oxygen-isotope ratios. We then compare the outcomes of the carbon reduction simulations with the baseline solution. For instance, net growth in cultivated tree stocks increases carbon sequestration and storage capacity. Therefore, marginal lands are not necessarily more economically efficient at sequestering carbon, and indeed the opposite may be true. Paralysis would also affect the respiratory system leading to elevated breathing rates and an increase in carbon dioxide expiration. See all examples of carbon These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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