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| 氧气 (一种气态化学元素，在细胞呼吸和燃烧过程中最基本的和最丰富的元素，在地壳中占20%的空气量。) | |||
| oxygène: 30 phrases in 11 subjects |
| Agriculture | 1 |
| Biology | 1 |
| Environment | 6 |
| Fish farming pisciculture | 3 |
| Food service and catering | 2 |
| Forestry | 1 |
| Ichthyology | 2 |
| Pulp and paper industry | 1 |
| Research and development | 6 |
| Thermal Energy | 1 |
| Water supply | 6 |