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| основная операция | |||
| элементарная операция | |||
| 基本运算: 5 phrases in 3 subjects |
| Computers | 1 |
| Information technology | 2 |
| Technology | 2 |
The server is undergoing maintenance and the site is working in read-only mode. Please check back later.">Add | The server is undergoing maintenance and the site is working in read-only mode. Please check back later.">Report an error
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