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期 : 87 phrases in 10 subjects |
| Biology | 1 |
| Chemistry | 1 |
| Construction | 1 |
| Electronics | 2 |
| Geology | 2 |
| Mathematics | 1 |
| Nautical | 2 |
| Plastics | 1 |
| Technology | 70 |
| Television | 6 |
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