さんそ
oxygen
noun
深呼吸すると酸素をたくさん吸いられます。
When you breathe deeply, you can inhale a lot of oxygen.
山の頂上では酸素が薄いです。
The oxygen is thin at the mountain's peak.
Popoling schedules reviews so words actually stick — plus speaking practice and guided conversations.
Start free14 days free. No card, no auto-charge.