| 词汇 | chromium |
| 释义 | chromium noun[ U ] uk /ˈkrəʊ.mi.əm/ us /ˈkroʊ.mi.əm/(symbolCr) a chemical element that is a hard, blue-grey metal, used in combination with other metals to make chrome（化学元素）铬 Chemical elements actinium alkali metal americium astatine berkelium brimstone bromine calcium fluorine germanium iodine lithium manganese nickel plutonium quicksilver selenium silicon sodium transition metal Prolonged heating and high temperatures have a very bad effect upon chromium steels. The combined action of tungsten and chromium in steel gives to it the remarkable property of maintaining its cutting edge at relatively high temperature. The following table shows the percentages of carbon, manganese, nickel, chromium and vanadium in typical steel alloys for engineering purposes. The nickel intensifies the physical characteristics of the chromium and the chromium has a similar effect on the nickel. When chromium is alloyed with tungsten, a very definite red-hardness is noticed with a great increase of cutting efficiency. chromium | American Dictionarychromium noun[ U ] us/ˈkroʊ·mi·əm/ a hard, blue-gray, element used in combination with metals or put on a material to form a shiny covering Examples of chromiumchromium Elemental analyses of this deteriorated wood showed high levels of copper, chromium, iron, and lead, suggesting that a caustic chemical spill had occurred. Results were obtained for arsenic, cadmium, chromium, cobalt, copper, lead, nickel, and zinc. Chromium supplementation in growing goats indicated that the kids were responding normally to this stress. The same procedure was adopted to compute the combined pollution load from hides and skins for 2004 and for chromium for both years. The heavy metals in the ash included arsenic, cadmium, chromium, manganese, nickel, cobalt, copper, zinc, and lead. Chromium supplementation does not influence glucose metabolism or insulin action in response to cold exposure in mature sheep. The test was performed after 135 days of chromium supplementation. There were burns that contained wood that did not have high arsenic, chromium, and copper readings (burns 11, 12, 14, 15, and 19). Influence of chromium tripicolinate on glucose metabolism and nutrient partitioning in growing lambs. High concentrations of chromium and lead are associated with this caustic chemical spill. For the surface coated with fish extract there was also a significant decrease in the chromium signal. The most commonly used metals are titanium, cobalt, chromium, molybdenum alloy and steel. As a result, these soils contain high concentrations of oxidized transition metal minerals, particularly chromium and manganese, as well as perchlorate. The highest readings of arsenic, chromium, and copper all occurred when wood was present. Further correlations existed between heavy metals in the ash for: arsenic and chromium; and arsenic and manganese. 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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