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| сменять друг друга; последовательно идти чередой одному за другим | |||
| вместо предисловия | |||
| 代序: 44 phrases in 11 subjects |
| Business | 1 |
| Chemistry | 1 |
| Computers | 3 |
| Customs | 1 |
| Education | 1 |
| General | 20 |
| Geology | 4 |
| Information technology | 2 |
| Mathematics | 1 |
| Oil processing plants | 1 |
| Technology | 9 |
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