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estratificar | |||
dividir en estratos | |||
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estratificado |
stratify : 21 phrases in 10 subjects |
Communications | 1 |
Earth sciences | 3 |
Finances | 3 |
Forestry | 1 |
Mathematics | 1 |
Medical | 1 |
Natural sciences | 3 |
Pharmacy and pharmacology | 1 |
Statistics | 4 |
Transport | 3 |