hydrogen

noun

1. 氢；氢气
   a chemical element. Hydrogen is a gas that is the lightest of all the elements. It combines with oxygen to form water.

1. 氢;氢气
   Hydrogen is a colourless gas that is the lightest and commonest element in the universe.

1. They'd have a lot of hydrogen sulfide gas bound up in their cells.
   他们的牢房里有大量的硫化氢气体。
2. Carbon, hydrogen and oxygen combine chemically to form carbohydrates and fats
   碳、氢、氧化合形成碳水化合物和脂肪。
3. A hydrogen leak forced NASA to ground the space shuttle.
   氢气泄漏迫使美国国家航空航天局停止了航天飞机的发射。
4. Hydrogen is a one-valence element.
   氢是一价的元素。
5. Water is a compound containing the elements hydrogen and oxygen.
   水是含有氢元素和氧元素的化合物。
6. Water can be resolved [ decomposed] into hydrogen and oxygen.
   水可分解为氢和氧。
7. Water contains hydrogen and oxygen.
   水含有氢和氧。
8. Water is composed of hydrogen and oxygen.
   水由氢与氧化合而成。
9. Zinc displaces the hydrogen of dilute acids.
   锌置换了稀酸中的氢。
10. The first bubbles to escape from the liquid are a mixture of air and hydrogen.
    从该液体中最先逸出的气泡是空气和氢的混合物。
11. But why water and not, say, hydrogen peroxide or even ammonia?
    可是，为什么是水，而不是双氧水或是氨水呢？
12. Each of the four valency electrons of the carbon atom is shared with one of a hydrogen atom.
    碳原子的四个价电子都各与氢原子的一个价电子共用。
13. Among the common toxic gases are sulfur dioxide, methane, the oxides of nitrogen, ammonia, hydrogen sulfide, and hydrogen cyanide; and ( most commonly) carbon monoxide.
    常见的有毒气体有二氧化硫、甲烷、氧化氮、氨、硫化氢、氰化氢以及最常见的一氧化碳。
14. Hydrogen combines chemically with oxygen to form water.
    氢和氧化合成为水。
15. The simplest covalently bonded molecule is formed from two hydrogen atoms.
    最简单的共价键分子由两个氢原子组成。
16. Some balloons are filled with hydrogen, some with helium.
    有的气球是用氢气充填的，有的则用氦气。
17. Water is made up of atoms of hydrogen and oxygen.
    水由氢和氧的原子构成。
18. Catagensis is marked by a loss of hydrogen, and consequently by a decrease of the h/ c ratio.
    后生阶段以氢减少必然导致h／d比率降低为特征。
19. Catalase catalyes the breakdown of hydrogen peroxide.
    过氧化氢酶催化过氧化氢的分解。
20. It has studied the action of hydrogen peroxide on nitrous acid.
    它研究了过氧化氢对亚硝酸的作用。
21. Hydrogen and oxygen are the constituents of water.
    氢和氧是水的主要成分。
22. Qualitative analysis shows that water is made up of hydrogen and oxygen.
    定性分析表明水是由氢氧结合而成的。
23. Acids produce positively charged hydrogen atoms when dissolved in water.
    酸在水中溶解时可生成带正电荷的氢原子。
24. And now I have to fill this molecular hydrogen.
    现在我填充了分子氢。
25. The zirconium can react with water to produce zirconium oxide and hydrogen.
    锆可以和水反应，产生氧化锆和氢气。
26. This simple molecule consists of one oxygen atom and two hydrogen atoms.
    这个简单的水分子由一个氧原子和两个氢原子构成。
27. Oxygen, hydrogen and nitrogen are all gases.
    氧气、氢气和氮气都是气体。
28. The classification, characteristics and current situation for method and technology of aluminum melt hydrogen removal has been summarized.
    概述了铝熔体除氢方法和技术的分类、特点和发展现状，并对其发展趋势进行了展望。
29. They have tested a hydrogen bomb.
    他们试验了一颗氢弹。

noun

1. a nonmetallic univalent element that is normally a colorless and odorless highly flammable diatomic gas

   Synonym:    Hatomic number 1