| query | O_____ is a colourless gas that exists in large quantities in the air. All plants and animals need oxygen in order to live .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. |
|---|---|
| word | oxygen |
| full-definition | noun 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. |
| cefr-level | B2 |
Tags: oxford5k::cefr-level:b2
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