hydrogen
🇺🇸
/ˈhaɪdrədʒən/
🇬🇧
/ˈhaɪdrədʒən/
noun
C1
The lightest chemical element, a gas that combines with oxygen to make water.
Hydrogen is used as fuel because it burns cleanly and produces only water.
氢被用作燃料，因为它燃烧清洁且只产生水。
translation
氢
词形变化
Plural
hydrogens