氢

• Zinc displaces the hydrogen of dilute acids .
  锌置换了稀酸中的氢。
• The hydroperoxides are unstable compounds .
  氢过氧化物是不稳定的化合物。
• Water is composed of hydrogen and oxygen .
  水由氢与氧化合而成。
• Water consists of hydrogen and oxygen .
  水由氢和氧二元素合成。
• Water is composed of hydrogen and oxygen .
  水是由氢和氧组成。
• Water can be resolved [decomposed] into hydrogen and oxygen .
  水可分解为氢和氧。
• Water is composed of the elements hydrogen and oxygen .
  水是由氢、氧元素组成的。
• Hydrogen is a one-valence element .
  氢是一价的元素。
• Soluble metallic hydroxides are bases that are alkalies .
  可溶解的金属氢氧化合物都是碱。
• Oxygen and hydrogen make water .
  氧和氢构成水。