Far from the sun, in the outer solar system, beyond Jupiter's orbit, temperatures are low enough to permit ices to form out of water and out of gases like methane and carbondioxide.
在远离太阳的外太阳系，在木星轨道之外，温度低到足以使冰从水以及甲烷和二氧化碳等气体中形成。
2
During sleep the automatic metabolic system is less responsive to carbondioxide levels and oxygen levels in the blood.
在睡眠期间，自动的新陈代谢系统对血液中二氧化碳和氧气的含量反应并不灵敏。
3
This occurs because during NREM sleep the automatic, metabolic system has exclusive control over breathing and the body uses less oxygen and produces less carbondioxide.