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隔周 : 28 phrases in 14 subjects |
| Advertising | 4 |
| Agriculture | 2 |
| Air defense | 1 |
| Automobiles | 1 |
| Aviation | 4 |
| Business | 5 |
| Construction | 1 |
| Desert science | 1 |
| Earth sciences | 1 |
| Electric machinery | 1 |
| Electronics | 3 |
| Polymers | 1 |
| Technology | 2 |
| Telecommunications | 1 |
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