Usages of l'ossigeno
Dovete mettere la maschera, ossia quella per l'ossigeno.
You must put on the mask, that is to say the oxygen one.
Il personale, ossia gli assistenti, controlla l'ossigeno.
The personnel, that is to say the assistants, check the oxygen.
Un alpinista qualsiasi non si ostina quando manca l'ossigeno.
Any ordinary mountaineer does not persist when oxygen is lacking.
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