hydrogen
noun [ U ] uk/ˈhaɪ.drə.dʒən/ us/ˈhaɪ.drə.dʒən/ (symbol H)
氢，氢气
a chemical element that is the lightest gas, has no colour, taste, or smell, and combines with oxygen to form water
英汉双解词典收录81607条英汉双解翻译词条，基本涵盖了全部常用单词的读音、翻译及用法，是英语学习的有利工具。