| 释义 |
ox·y·gen AHD[ŏkʹsĭ-jən] D.J.[ˈɒksɪdʒən]K.K.[ˈɑksɪdʒən]n.Symbol O （名词）符号 O - A nonmetallic element constituting 21 percent of the atmosphere by volume that occurs as a diatomic gas, O2, and in many compounds such as water and iron ore. It combines with most elements, is essential for plant and animal respiration, and is required for nearly all combustion. Atomic number 8; atomic weight 15.9994; melting point -218.4°C; boiling point -183.0°C; gas density at 0°C 1.429 grams per liter; valence 2. See table at element 氧：一种非金属元素，按体积算占空气的21%，它是一种双原子气体O2，存在于许多化合物如水和铁矿物中。它与许多元素化合，对植物和动物呼吸是根本必需的，几乎所有的燃烧都要求有氧。原子序数是8；原子量是15.9994；熔点是-218.4°C；沸点是-183.0°C；气体密度是0°C时一升为1.429克； 原子价是2 参见 element
- French oxygène 法语 oxygène
- Greek oxus [sharp, acid] * see ak- 希腊语 oxus [尖的，酸的] * 参见 ak-
- French -gène [-gen] 法语 -gène [后缀，表示“被生成”，“生成的”]
ox'ygenʹic AHD[-jĕnʹĭk] （形容词）ox'ygenʹically adv.（副词）oxygʹenous AHD[ŏk-sĭjʹə-nəs] （形容词） |