oxygen
Definition
A colorless, odorless gas essential for respiration in most living organisms.
中文 一种无色无味的气体，对大多数生物的呼吸至关重要。
Example
"Patients in the hospital are often given oxygen through a mask."
A colorless, odorless gas essential for respiration in most living organisms.
中文 一种无色无味的气体，对大多数生物的呼吸至关重要。
"Patients in the hospital are often given oxygen through a mask."