context: Breathing pure O
  2 in space applications, such as in some modern space suits, or in early spacecraft such as Apollo, causes no damage due to the low total pressures used. In the case of spacesuits, the O
  2 partial pressure in the breathing gas is, in general, about 30 kPa (1.4 times normal), and the resulting O
  2 partial pressure in the astronaut's arterial blood is only marginally more than normal sea-level O
  2 partial pressure (for more information on this, see space suit and arterial blood gas).
question: అంతరిక్ష సూట్లలో ఆక్సిజన్ స్థాయిలతో సముద్ర మట్టాన్ని పోల్చడం ఏమిటి?
answers: only marginally more marginally more than normal marginally more marginally more only marginally more