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| main constituent | |||
| major constituent; major component | |||
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| principal component | |||
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| principal components | |||
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composant principal : 7 phrases in 7 subjects |
| Coal | 1 |
| Environment | 1 |
| Mathematics | 1 |
| Name of organization | 1 |
| Nuclear physics | 1 |
| Pharmacy and pharmacology | 1 |
| Statistics | 1 |