This flashcard defines "oxygen" as an uncountable noun referring to the colorless gas essential for life in air, needed by all plants and animals. It highlights its importance for the human brain and its chemical nature.
This flashcard defines "oxygen" as an uncountable noun referring to the colorless gas essential for life in air, needed by all plants and animals. It highlights its importance for the human brain and its chemical nature.
[N-UNCOUNT 不可数名词]氧；氧气Oxygen is a colourless gas that exists in large quantities in the air. All plants and animals need oxygen in order to live.
The human brain needs to be without oxygen for only four minutes before permanent damage occurs.
人的大脑缺氧4分钟后便会造成永久性损伤。
Oxford
oxy·gen/ˈɒksɪdʒən; NAmEˈɑːksɪdʒən/noun[uncountable ](symb.O )a chemical element. Oxygenis a gas that is present in air and water and is necessary for people, animals and plants to live. 氧；氧气oxy·gen/ˈɒksɪdʒən; NAmEˈɑːksɪdʒən/