hydrogen

名词 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
   同义词：H, atomic number 1

1. Hydrogen and oxygen combine/Hydrogen combines with oxygen to form water.
   氢与氧化合成水。
2. Water is composed of the elements hydrogen and oxygen.
   水是由氢元素和氧元素组成的。
3. A molecule of water consists of two atoms of hydrogen and one atom of oxygen.
   水分子含有两个氢原子和一个氧原子。
4. Two atoms of hydrogen combine with one atom of oxygen to form a molecule of water.
   两个氢原子和一个氧原子结合而成一个水分子。
5. Hydrogen and oxygen are gases.
   氢和氧是气体。
6. Hydrogen is highly explosive.
   氢极易爆炸。
7. Water is composed of hydrogen and oxygen.
   水由氢和氧组成。
8. Water contains hydrogen and oxygen.
   水含有氢和氧。

hy.dro.gen

n.Symbol H （名词）符号 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
氢：一种无色，易燃的气体物质，在所有气体中最轻，而宇宙中最多用来生产合成氨和甲醇，提炼石油，氢化有机物质作为收缩的气体，用在氧氢焰熔接器和火箭燃料中。原子序数为；原子量为.00797；熔点为-259.4=C；沸点-252.8=C；零度时的密度是0.08987克/公升；原子价为参见 element

来源：
French hydrogène
法语 hydrogène
Greek hudro- [hydro-]
希腊语 hudro- [前缀]
-gène [-gen]
-gène [后缀]

【引伸】
hydrog.enous