名詞 hydrogen:

1. a nonmetallic univalent element that is normally a colorless and odorless highly flammable diatomic gas; the simplest and lightest and most abundant element in the universe
   同義詞：H, atomic number 1

1. Hydrogen and oxygen combine/Hydrogen combines with oxygen to form water.
   氫與氧化合成水。
2. Water is composed of the elements hydrogen and oxygen.
   水是由氫元素和氧元素組成的。
3. A molecule of water consists of two atoms of hydrogen and one atom of oxygen.
   水分子含有兩個(gè)氫原子和一個(gè)氧原子。
4. Two atoms of hydrogen combine with one atom of oxygen to form a molecule of water.
   兩個(gè)氫原子和一個(gè)氧原子結(jié)合而成一個(gè)水分子。
5. Hydrogen and oxygen are gases.
   氫和氧是氣體。
6. Hydrogen is highly explosive.
   氫極易爆炸。
7. Water is composed of hydrogen and oxygen.
   水由氫和氧組成。
8. Water contains hydrogen and oxygen.
   水含有氫和氧。

hy.dro.gen

n.Symbol H （名詞）符號(hào) H
A colorless, highly flammable gaseous element, the lightest of all gases and the most abundant element in the universe, used in the production of synthetic ammonia and methanol, in petroleum refining, in the hydrogenation of organic materials, as a reducing atmosphere, in oxyhydrogen torches, and in rocket fuels. Atomic number ; atomic weight .00797; melting point -259.4=C; boiling point -252.8=C; density at 0=C 0.08987 gram per liter; valence .See table at element
氫：一種無(wú)色，易燃的氣體物質(zhì)，在所有氣體中最輕，而宇宙中最多用來(lái)生產(chǎn)合成氨和甲醇，提煉石油，氫化有機(jī)物質(zhì)作為收縮的氣體，用在氧氫焰熔接器和火箭燃料中。原子序數(shù)為；原子量為.00797；熔點(diǎn)為-259.4=C；沸點(diǎn)-252.8=C；零度時(shí)的密度是0.08987克/公升；原子價(jià)為參見 element

來(lái)源：
French hydrogène
法語(yǔ) hydrogène
Greek hudro- [hydro-]
希臘語(yǔ) hudro- [前綴]
-gène [-gen]
-gène [后綴]

【引伸】
hydrog.enous