Methane is a kind of hothouse effect gss being able to destroying ozonosphere. The damages caused by its leakage to atmosphericenvelope are followed with interest by every country over the world.
甲烷是一种对臭氧层有破坏作用的温室效应气体，它的泄漏排放对大气环境的影响已引起世界各国的关注。
2
The outer envelope of all four sections contains air maintained at atmospheric pressure.