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检查和 : 61 phrases in 10 subjects |
| Business | 3 |
| Computers | 1 |
| Education | 5 |
| General | 40 |
| Metallurgy | 1 |
| Military | 1 |
| Oil processing plants | 1 |
| Radio | 1 |
| Technology | 6 |
| United Nations | 2 |
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