hydrogen 'haidrәdʒәn
释义
n. 氢
[化] 氢H-2
英文释义
n. 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
词形变化
复数: hydrogens
BNC词频排名: 5,200 | 当代语料库词频排名: 5,103