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| nature study | |||
| 自然研究: 48 phrases in 13 subjects |
| Animal husbandry | 3 |
| Aviation | 2 |
| Business | 1 |
| Earth sciences | 24 |
| Economy | 1 |
| Electronics | 2 |
| Environment | 1 |
| General | 8 |
| Multimedia | 1 |
| Name of organization | 2 |
| Oil / petroleum | 1 |
| Space | 1 |
| United Kingdom | 1 |
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