In deep water, methane gas oxidizes into carbon dioxide before it reaches the surface.
在深水中，甲烷气体到达水面之前就会氧化为二氧化碳。
2
Earth is right for life because of its gas atmosphere, surfacewater and moderately warm temperatures.
地球最适宜于生命的存在，因为地球有大气层、地表水和适宜的温度。
3
The researchers say the dead creatures probably are floating to the surface rather than sinking because they have absorbed gas bubbles as they filtered water for food.