Oxygen is a colourless gas that exists in large quantities in the air. All plants and animals need oxygen in order to live. 氧气
noun [专属名词] 氧，氧气
The human brain needs to be without oxygen for only four minutes before permanent damage occurs. 人脑缺氧只需4分钟就会造成永久性损伤。
- Oxygen 出现在下面的课文中（提供视频、音频及笔记等可系统性学习）
- Lesson 55 From the earth:Greetings Oxygen 名词: 氧气
- Lesson 35 Space odyssey Oxygen 名词: 氧气
- Lesson 45 The power of the press
- Lesson 43 Are there strangers in space?
oxy(酸； 氧) + gen(产生) → 产生酸的东西 → 氧， 氧气
- 网友用 “Oxygen” 造句精选
- Plants absorb oxygen. 植物吸收氧气。