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.
植物在白天产生氧气，这有助于我们呼吸。
translation
氧气
词形变化
Plural
oxygens