oxygen
🇺🇸
/ˈɑːksɪdʒən/
🇬🇧
/ˈɒksɪdʒən/
noun
B2
A gas in air that living things need to breathe and stay alive.
Plants produce oxygen during the day, which helps us breathe.
植物在白天產生氧氣，這有助於我們呼吸。
translation
氧氣
詞形變化
Plural
oxygens