B1 noun ˈɒk.sɪ.dʒən
oxygen
氧气。无色、无味的气体,是生命必不可少的成分。
Meaning
A colorless, odorless reactive gas, the chemical element of atomic number 8 and the life-supporting component of the air.
Example
Oxygen is vital for life.
氧气对生命至关重要。