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célérité du son | |||
vitesse des ondes acoustiques; vitesse du son |
acoustic: 23 phrases in 9 subjects |
Earth sciences | 9 |
Environment | 1 |
General | 3 |
Health care | 2 |
Medical | 2 |
Natural resourses and wildlife conservation | 1 |
Physical sciences | 2 |
Technology | 1 |
United Nations | 2 |