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The Collaborative International Dictionary of English v.0.48 (gcide)

Chromophore \Chro"mo*phore\, n. [Gr. ? color fe`rein to bear.]
(Chem.)
Any chemical group or residue (as {NO2}; {N2}; or {O2}) which
imparts some decided color to the compound of which it is an
ingredient.
[1913 Webster]

The Free On-line Dictionary of Computing (foldoc)

Object-Oriented. {Object-oriented database} language used in
the {Altair} project. Implemented as an {interpreter}. GIP
Altair, Versailles, France. Francois Bancilhon et al, in
Advances in Object-Oriented Database Systems, K.R. Dittrich
ed, LNCS 334, Springer 1988. See {CO2}.

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O2 - Essential For Living
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Oxygen - Wikipedia
They realized that the known reversible reaction 2BaO (s) + O2 (g) ↔ 2BaO2 (s) was deactivated by the formation of barium carbonate from carbon dioxide in the air; treating air to remove the carbon dioxide allowed the reaction be reversed indefinitely
氧气（氧元素形成的一种单质）_百度百科
氧气（oxygen）是氧元素最常见的单质形态，分子式O2，相对分子质量32。在标准状况下，两个氧原子结合形成氧气，是一种无色、无嗅、无味的双原子气体。氧气是空气的组分之一，占了空气体积的20 9%。
O2 Log In → Sign in to your My O2 account
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The O2 London | Music, Bars, Restaurants Entertainment | The O2
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氧气 - 维基百科，自由的百科全书
2 H 2 O 2 = = = = MnO 2 2 H 2 O + O 2 ↑ {\displaystyle {\ce {2H2O2 {\overset {MnO2} {=\!=\!=\!=}} {2H2O}+O2\uparrow }}} 这种方法简单易操作，节约能源，且生成物没有污染，是实验室制取氧气的常用方法之一。电解水电解水也能制得氧气。电解水时，正极产生氧气，负极产生氢气。
QQ - O2
QQ - O2提供创新的游戏和娱乐体验，致力于为用户打造独特的数字互动平台。
Events | The O2
MANILOW The Last Last London Concert The O2 arena Buy tickets More info 18 June 2026
O²⁻_百度百科
O2-（氧离子）是氧元素的简单阴离子，外文名为Oxygen Ion，分子量为16。氧化物中氧呈-2氧化态，可与电负性较小的金属形成离子型氧化物，常见类型包括碱金属M2O、碱土金属MO及铝系M2O3等。
Oxygen | O2 | CID 977 - PubChem
Oxygen (O2) is reduced by both enzymatic and nonenzymatic processes to the superoxide radical (O2-) This radical species of oxygen is postulated to be formed in vivo in animals through activity of some iron - sulfur oxidation-reduction enzymes and certain flavoproteins

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