se raréfier

Mais notre oxygène se raréfiait plus rapidement que notre C02 n'augmentait, ce qui était tout à fait inattendu. Parce que nous les avions vu évoluer en parallèle dans le module de test.

But our oxygen was going down faster than our CO2 was going up, which was quite unexpected, because we had seen them going in tandem in the test module.

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