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| infancy | |||
| building stage (грозового облака); cumulus stage (грозового облака); growth stage (грозового облака) | |||
| начальная стадия развития: 12 phrases in 8 subjects |
| Biology | 1 |
| Business | 2 |
| Economy | 2 |
| Firefighting and fire-control systems | 3 |
| Makarov | 1 |
| Mathematics | 1 |
| Medical | 1 |
| Scientific | 1 |